ci: bump actions/checkout from 3 to 7

.github/workflows/backend-ci.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4

.github/workflows/ci-performance.yml

@@ -10,7 +10,7 @@ jobs:
     name: Backend — lint, typecheck, test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-node@v4
         with:
@@ -54,7 +54,7 @@ jobs:
     name: Frontend — build, lint, test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-node@v4
         with:
@@ -101,7 +101,7 @@ jobs:
     name: Contracts — fmt, clippy, test, build WASM
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: dtolnay/rust-toolchain@stable
         with:

.github/workflows/codeql.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3
@@ -42,7 +42,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable

.github/workflows/contract-abi-snapshot.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up Rust
         uses: dtolnay/rust-toolchain@stable

.github/workflows/contract-fuzzing.yml

@@ -36,7 +36,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Rust
         uses: dtolnay/rust-toolchain@stable

.github/workflows/contract-upgrade-check.yml

@@ -20,13 +20,13 @@ jobs:
 
     steps:
       - name: Checkout PR branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           path: pr
           fetch-depth: 0
 
       - name: Checkout base branch (main)
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           ref: ${{ github.base_ref }}
           path: base

.github/workflows/contracts-ci.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Rust
         uses: dtolnay/rust-toolchain@stable

.github/workflows/docs.yml

@@ -20,7 +20,7 @@ jobs:
       pages_enabled: ${{ steps.pages_check.outputs.enabled }}
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Check if GitHub Pages is enabled
         id: pages_check

.github/workflows/format-check.yml

@@ -9,7 +9,7 @@ jobs:
   prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-node@v4
         with:

.github/workflows/frontend-ci.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4
@@ -95,7 +95,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4
@@ -167,7 +167,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4

.github/workflows/image-signing.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3

.github/workflows/load-test.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Install k6
         run: |

.github/workflows/mainnet-deploy.yml

@@ -12,7 +12,7 @@ jobs:
     name: Verify mainnet readiness checklist
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Confirm deploy intent
         run: |
@@ -38,6 +38,6 @@ jobs:
     runs-on: ubuntu-latest
     environment: mainnet
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Deploy contracts
         run: echo "Deploy steps go here — gated on readiness-gate passing."

.github/workflows/monitoring-ci.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Install promtool
         run: |

.github/workflows/mutation-testing.yml

@@ -22,7 +22,7 @@ jobs:
     name: cargo-mutants (rewards + campaign contracts)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@stable

.github/workflows/observability-ci.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Install Prometheus (for promtool)
         run: |
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-node@v4
         with:
@@ -62,7 +62,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-node@v4
         with:

.github/workflows/openapi-codegen.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-node@v4
         with:

.github/workflows/openapi-validation.yml

@@ -18,7 +18,7 @@ jobs:
     name: Validate OpenAPI spec completeness
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-node@v4
         with:
           node-version: 20
@@ -48,7 +48,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: validate-spec
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-node@v4
         with:
           node-version: 20
@@ -89,7 +89,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: validate-spec
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-node@v4
         with:
           node-version: 20

.github/workflows/performance-gate.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
 
       - name: Setup Node.js
         uses: actions/setup-node@v3
@@ -53,7 +53,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v7
 
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable

.github/workflows/python-sdk-ci.yml

@@ -17,7 +17,7 @@ jobs:
         python-version: ['3.9', '3.11', '3.12']
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-python@v5
         with:
@@ -41,7 +41,7 @@ jobs:
       id-token: write # OIDC trusted publishing
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-python@v5
         with:

.github/workflows/release-bindings.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Rust (stable + wasm32 target)
         uses: dtolnay/rust-toolchain@stable

.github/workflows/repo-sanity.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4

.github/workflows/reproducible-build.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Install Rust toolchain (pinned)
         uses: dtolnay/rust-toolchain@stable

.github/workflows/sca-sbom.yml

@@ -20,7 +20,7 @@ jobs:
     name: cargo audit (Rust contracts)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -42,7 +42,7 @@ jobs:
     name: cargo deny (license + advisory policy)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: EmbarkStudios/cargo-deny-action@v2
         with:
           log-level: warn
@@ -59,7 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [cargo-audit, cargo-deny]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4

.github/workflows/secrets-scan.yml

@@ -14,7 +14,7 @@ jobs:
     name: Scan for secrets
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
 

.github/workflows/security-headers-check.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4

.github/workflows/security-headers.yml

@@ -12,7 +12,7 @@ jobs:
     name: Verify security headers
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Start backend
         run: |

.github/workflows/testnet-integration.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Node.js
         uses: actions/setup-node@v4

.github/workflows/visual-regression.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Setup Node.js
         uses: actions/setup-node@v4