ci: enforce strict exit codes in workflow tests

- Remove `|| echo "⚠️ ..."` fallbacks that masked failures
- Add explicit `exit 1` on port readiness failures and missing test directories
- Track port_ready flag in health check loops to fail if services don't start
- Replace warning emoji (⚠️) with error emoji (❌) for actual failures
- Fix docs-validation to use curated Markdown target list excluding high-noise directories
- Update rust-zk-tests paths from gpu_acceleration/research to dev

.gitea/workflows/js-sdk-tests.yml

@@ -56,13 +56,16 @@ jobs:
       - name: Lint
         run: |
           cd /var/lib/aitbc-workspaces/js-sdk-tests/repo/packages/js/aitbc-sdk
-          npm run lint 2>/dev/null && echo "✅ Lint passed" || echo "⚠️ Lint skipped"
-          npx prettier --check "src/**/*.ts" 2>/dev/null && echo "✅ Prettier passed" || echo "⚠️ Prettier skipped"
+          npm run lint
+          echo "✅ Lint passed"
+          npx prettier --check "src/**/*.ts"
+          echo "✅ Prettier passed"
 
       - name: Run tests
         run: |
           cd /var/lib/aitbc-workspaces/js-sdk-tests/repo/packages/js/aitbc-sdk
-          npm test 2>/dev/null && echo "✅ Tests passed" || echo "⚠️ Tests skipped"
+          npm test
+          echo "✅ Tests passed"
 
       - name: Cleanup
         if: always()