Poll PyPI API for version availability before verification

Replace fixed 30-second sleep with a retry loop that polls the PyPI
API every 5 seconds until the expected version appears. This handles
CDN propagation delays gracefully instead of failing on slow updates.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mavam

.github/workflows/publish.yaml

@@ -77,9 +77,6 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v4
 
-      - name: Wait for package availability
-        run: sleep 30
-
       - name: Determine expected version
         id: expected-version
         run: |
@@ -92,6 +89,23 @@ jobs:
           echo "expected_tag=$tag" >> "$GITHUB_OUTPUT"
           echo "expected_version=$version" >> "$GITHUB_OUTPUT"
 
+      - name: Wait for package availability
+        env:
+          EXPECTED_VERSION: ${{ steps.expected-version.outputs.expected_version }}
+        run: |
+          echo "Waiting for version $EXPECTED_VERSION to appear on PyPI..."
+          for i in {1..30}; do
+            version=$(curl -sf https://pypi.org/pypi/tenzir-ship/json | jq -r '.info.version' || echo "")
+            if [ "$version" = "$EXPECTED_VERSION" ]; then
+              echo "Version $EXPECTED_VERSION is now available on PyPI"
+              exit 0
+            fi
+            echo "Attempt $i: found version '$version', waiting 5s..."
+            sleep 5
+          done
+          echo "Timeout waiting for version $EXPECTED_VERSION on PyPI" >&2
+          exit 1
+
       - name: Verify published version
         env:
           EXPECTED_VERSION: ${{ steps.expected-version.outputs.expected_version }}