Add merged branch release notes to Gitea release body

Generates release notes from merged branches since last tag and
includes them in the release body via Gitea API.

💘 Generated with Crush

Assisted-by: Claude Sonnet 4.6 via Crush <crush@charm.land>

.woodpecker/release.yaml

@@ -15,16 +15,27 @@ steps:
     depends_on: [test]
 
   - name: release
-    image: woodpeckerci/plugin-gitea-release
+    image: git.unkin.net/unkin/almalinux9-base:20260325
-    settings:
-      api_key:
-        from_secret: GITEA_TOKEN
-      base_url: https://git.unkin.net
-      files: node-lookup
-      title: ${CI_COMMIT_TAG}
     environment:
       DRONECI_PASSWORD:
         from_secret: DRONECI_PASSWORD
+    commands:
+      - |
+        PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
+        if [ -n "$PREV_TAG" ]; then
+          NOTES=$(git log "${PREV_TAG}..${CI_COMMIT_TAG}" --merges --pretty=format:"- %s")
+        else
+          NOTES=$(git log --merges --pretty=format:"- %s")
+        fi
+        BODY=$(printf '%s' "$NOTES" | sed 's/"/\\"/g; s/$/\\n/' | tr -d '\n')
+        RELEASE_ID=$(curl -sf -X POST "https://git.unkin.net/api/v1/repos/${CI_REPO}/releases" \
+          -u "droneci:$DRONECI_PASSWORD" \
+          -H "Content-Type: application/json" \
+          -d "{\"tag_name\":\"${CI_COMMIT_TAG}\",\"name\":\"${CI_COMMIT_TAG}\",\"body\":\"${BODY}\"}" \
+          | grep -o '"id":[0-9]*' | head -1 | cut -d: -f2)
+        curl -sf -X POST "https://git.unkin.net/api/v1/repos/${CI_REPO}/releases/${RELEASE_ID}/assets" \
+          -u "droneci:$DRONECI_PASSWORD" \
+          -F "attachment=@node-lookup"
     backend_options:
       kubernetes:
         serviceAccountName: default