Add daily workflow to clean up old releases (keep latest 5)

Runs daily at 6am UTC and on manual dispatch. Separately tracks app
releases (v*) and sidecar releases (sidecar-v*), keeping the latest
5 of each and deleting older ones along with their tags.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/cleanup-releases.yml

@@ -0,0 +1,65 @@
+name: Cleanup Old Releases
+
+on:
+  # Run after release and sidecar workflows complete
+  schedule:
+    - cron: '0 6 * * *'  # Daily at 6am UTC
+  workflow_dispatch:
+
+jobs:
+  cleanup:
+    name: Remove old releases
+    runs-on: ubuntu-latest
+    env:
+      KEEP_COUNT: 5
+    steps:
+      - name: Cleanup old app releases
+        env:
+          BUILD_TOKEN: ${{ secrets.BUILD_TOKEN }}
+        run: |
+          REPO_API="${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}"
+
+          # Get all releases, sorted newest first (API default)
+          RELEASES=$(curl -s -H "Authorization: token ${BUILD_TOKEN}" \
+            "${REPO_API}/releases?limit=50")
+
+          # Separate app releases (v*) and sidecar releases (sidecar-v*)
+          APP_IDS=$(echo "$RELEASES" | jq -r '[.[] | select(.tag_name | startswith("v") and (startswith("sidecar") | not)) | .id] | .[]')
+          SIDECAR_IDS=$(echo "$RELEASES" | jq -r '[.[] | select(.tag_name | startswith("sidecar-v")) | .id] | .[]')
+
+          # Delete app releases beyond KEEP_COUNT
+          COUNT=0
+          for ID in $APP_IDS; do
+            COUNT=$((COUNT + 1))
+            if [ $COUNT -le ${{ env.KEEP_COUNT }} ]; then
+              continue
+            fi
+            TAG=$(echo "$RELEASES" | jq -r ".[] | select(.id == $ID) | .tag_name")
+            echo "Deleting app release $ID ($TAG)..."
+            curl -s -o /dev/null -w "HTTP %{http_code}\n" -X DELETE \
+              -H "Authorization: token ${BUILD_TOKEN}" \
+              "${REPO_API}/releases/$ID"
+            # Also delete the tag
+            curl -s -o /dev/null -X DELETE \
+              -H "Authorization: token ${BUILD_TOKEN}" \
+              "${REPO_API}/tags/$TAG"
+          done
+
+          # Delete sidecar releases beyond KEEP_COUNT
+          COUNT=0
+          for ID in $SIDECAR_IDS; do
+            COUNT=$((COUNT + 1))
+            if [ $COUNT -le ${{ env.KEEP_COUNT }} ]; then
+              continue
+            fi
+            TAG=$(echo "$RELEASES" | jq -r ".[] | select(.id == $ID) | .tag_name")
+            echo "Deleting sidecar release $ID ($TAG)..."
+            curl -s -o /dev/null -w "HTTP %{http_code}\n" -X DELETE \
+              -H "Authorization: token ${BUILD_TOKEN}" \
+              "${REPO_API}/releases/$ID"
+            curl -s -o /dev/null -X DELETE \
+              -H "Authorization: token ${BUILD_TOKEN}" \
+              "${REPO_API}/tags/$TAG"
+          done
+
+          echo "Cleanup complete. Kept latest ${{ env.KEEP_COUNT }} of each type."