feat: bake product version from Spec and expose build in health.

Resolve MAJOR.MINOR via EventHubSpec/VERSION; CI run_number as EVENTHUB_BUILD; health returns version/build/git_sha/built_at.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitea/workflows/ci.yml

@@ -74,17 +74,23 @@ jobs:
         run: bash scripts/build-erlang-base-images.sh --push
 
       - name: Build eventhub image
+        env:
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
+          GITEA_TOKEN: ${{ secrets.REGISTRY_PASSWORD }}
         run: |
           set -euo pipefail
-          APP_VERSION="$(tr -d '[:space:]' < VERSION 2>/dev/null || echo 0.0)"
+          APP_VERSION="$(bash scripts/resolve-product-version.sh)"
+          APP_BUILD="${GITHUB_RUN_NUMBER:-0}"
           GIT_SHA="${GITHUB_SHA:0:12}"
           BUILT_AT="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+          echo "Bake: version=${APP_VERSION} build=${APP_BUILD} git_sha=${GIT_SHA}"
           bash scripts/retry-docker-build.sh 5 60 -- \
             docker buildx build \
               --network=host \
               --pull \
               --file docker/Dockerfile \
               --build-arg "EVENTHUB_VERSION=${APP_VERSION}" \
+              --build-arg "EVENTHUB_BUILD=${APP_BUILD}" \
               --build-arg "EVENTHUB_GIT_SHA=${GIT_SHA}" \
               --build-arg "EVENTHUB_BUILT_AT=${BUILT_AT}" \
               --tag eventhub:latest \