fix: add port cleanup and retry for mock server startup

.woodpecker/smoke-init.yml

@@ -31,7 +31,11 @@ steps:
   - name: smoke-init
     image: python:3-alpine
     commands:
-      - apk add --no-cache bash curl jq git coreutils
+      - apk add --no-cache bash curl jq git coreutils procps
+      # Kill any existing mock server on port 3000
+      - fuser -k 3000/tcp 2>/dev/null || true
+      - sleep 1  # wait for port to be released
       - python3 tests/mock-forgejo.py &
-      - sleep 1  # wait for mock to start
+      # Wait for mock to be ready
+      - for i in $(seq 1 30); do curl -sf http://localhost:3000/api/v1/version >/dev/null 2>&1 && break || sleep 1; done
       - bash tests/smoke-init.sh