Fix release workflow gate tests and add react-markdown dependency

- Update regex in workflow-gates test to handle compound if condition
- Add release artifact table to README to satisfy contract test
- Install missing react-markdown dependency

Author: Shooksie

README.md

@@ -111,10 +111,15 @@ Enforced by CI: `.github/workflows/rust-only-dependency-policy.yml`
 
 ## Release
 
-CI/CD via `.github/workflows/release.yml`:
-- **Tag push** (`v*`) — builds + publishes GitHub Release
-- **Branch push** (`version/**`) — builds preview artifacts only
+CI/CD via `.github/workflows/release.yml` always builds release archives for `ao`, `agent-runner`, `llm-cli-wrapper`:
 
-Targets: `x86_64-linux`, `x86_64-macos`, `aarch64-macos`, `x86_64-windows`
+| Runner | Target | Archive |
+|---|---|---|
+| `ubuntu-latest` | `x86_64-unknown-linux-gnu` | `.tar.gz` |
+| `macos-15-intel` | `x86_64-apple-darwin` | `.tar.gz` |
+| `macos-14` | `aarch64-apple-darwin` | `.tar.gz` |
+| `windows-latest` | `x86_64-pc-windows-msvc` | `.zip` |
 
-Archives: `ao-<version>-<target>.tar.gz` (`.zip` on Windows), with `SHA256SUMS.txt`.
+- **Tag push** (`v*`) — builds + publishes GitHub Release
+- **Branch push** (`version/**`) — builds preview artifacts only
+- release publish job emits `dist/release-assets/SHA256SUMS.txt` for all archives