[codex] Integrate IFCDB-Agent openBIM sidecar

[ActiveInAI]

Summary

• Add IFCDB-Agent v1.0.9 as an isolated ifcdb_agent sidecar worker route for index/query/export/clash/quantity operations.
• Extend Rust conversion contracts, gateway adapter routing, runtime capabilities, OpenAPI examples/enums, and openBIM smoke coverage for ifcdb_* operations.
• Add production self-check metadata and documentation proving the local package/release is an external runtime boundary, not an in-process library.
• Carry forward the repo structure cleanup commit that was already pushed on the old Codex/cde speckle runtime contract #27 branch but not merged to main.

Runtime Boundary

The inspected /home/insome/下载/IFCDB-Agent-main.zip package contains documentation and PDFs, not importable Linux service source. The implementation therefore requires IFCDB_AGENT_URL and pins production to IFCDB_AGENT_VERSION=v1.0.9; missing configuration returns blocked and never fabricates IFCDB query, clash, export, or quantity results.

Validation

• python3 -m pytest in 06-workers -> 43 passed
• cargo fmt --all -- --check
• SWAGGER_UI_DOWNLOAD_URL=file:///home/insome/dev/insomeos/04-backend/target/debug/build/utoipa-swagger-ui-29943c50f4adb8cc/out/v5.17.14.zip cargo clippy --all-targets --all-features -- -D warnings
• SWAGGER_UI_DOWNLOAD_URL=file:///home/insome/dev/insomeos/04-backend/target/debug/build/utoipa-swagger-ui-29943c50f4adb8cc/out/v5.17.14.zip cargo test --all-features --workspace -> 139 harness + gateway/shared/compat/doc tests passed
• npx --yes @redocly/cli@2.30.0 lint 04-backend/openapi.yaml
• bun install --frozen-lockfile
• bun run lint -> pass with one existing warning in ModuleFileExplorer.tsx
• bun run typecheck
• bun run test -> 41 passed

Base

Rebased directly onto main after PR #28 was merged, so the PR no longer depends on the temporary infra-fix branch.