feat(ci): publish heartbeat as release

.gitea/workflows/build.yml

@@ -28,9 +28,41 @@ jobs:
         run: |
           CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-s -w" -o heartbeat ./cmd/heartbeat
 
-      - name: Upload artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: heartbeat-linux-amd64
-          path: heartbeat
-          retention-days: 365
+      - name: Publish release
+        env:
+          GITEA_TOKEN: ${{ gitea.token }}
+          SERVER_URL: ${{ gitea.server_url }}
+          REPO: ${{ gitea.repository }}
+          SHA: ${{ gitea.sha }}
+        run: |
+          set -e
+          TAG="build-${SHA::8}"
+
+          # Delete existing release + tag with this name if present (idempotent re-runs)
+          EXISTING=$(curl -sf \
+            -H "Authorization: token $GITEA_TOKEN" \
+            "$SERVER_URL/api/v1/repos/$REPO/releases/tags/$TAG" || true)
+          if [ -n "$EXISTING" ]; then
+            EXISTING_ID=$(echo "$EXISTING" | jq -r '.id')
+            curl -sf -X DELETE \
+              -H "Authorization: token $GITEA_TOKEN" \
+              "$SERVER_URL/api/v1/repos/$REPO/releases/$EXISTING_ID" || true
+            curl -sf -X DELETE \
+              -H "Authorization: token $GITEA_TOKEN" \
+              "$SERVER_URL/api/v1/repos/$REPO/tags/$TAG" || true
+          fi
+
+          # Create a pre-release tagged with the short commit SHA
+          RELEASE=$(curl -sf -X POST \
+            -H "Authorization: token $GITEA_TOKEN" \
+            -H "Content-Type: application/json" \
+            "$SERVER_URL/api/v1/repos/$REPO/releases" \
+            -d "{\"tag_name\":\"$TAG\",\"name\":\"$TAG\",\"prerelease\":true,\"draft\":false}")
+          RELEASE_ID=$(echo "$RELEASE" | jq -r '.id')
+
+          # Upload binary as release asset
+          curl -sf -X POST \
+            -H "Authorization: token $GITEA_TOKEN" \
+            -H "Content-Type: application/octet-stream" \
+            "$SERVER_URL/api/v1/repos/$REPO/releases/$RELEASE_ID/assets?name=heartbeat" \
+            --data-binary @heartbeat