feat: add pr-comment step to post CI results on pull requests

Posts a formatted markdown comment with coverage percentage, commit SHA,
branch info, and pipeline link to the Gitea PR via API.
Uses GITEA_API_TOKEN secret from Woodpecker for authentication.

.woodpecker/pipeline.yml

@@ -126,14 +126,13 @@ steps:
       UV_PYTHON: "3.13"
       GITEA_API_TOKEN:
         from_secret: gitea_api_token
-    depends_on: [coverage, lint, type]
+    depends_on: [coverage]
     when:
       event: [pull_request]
     commands:
       - pip install uv
       - |
         SHA7=$(printf '%.7s' "${CI_COMMIT_SHA:-unknown}")
-        COMMIT_URL="${CI_FORGE_URL}/${CI_REPO_OWNER}/${CI_REPO_NAME}/commit/${CI_COMMIT_SHA}"
         SOURCE="${CI_COMMIT_SOURCE:-${CI_COMMIT_SOURCE_BRANCH:-?}}"
         TARGET="${CI_COMMIT_TARGET:-${CI_COMMIT_TARGET_BRANCH:-?}}"
         PIPELINE_URL="${CI_PIPELINE_URL:-}"
@@ -142,6 +141,6 @@ steps:
           echo "pr-comment: GITEA_API_TOKEN not set, skipping"
           exit 0
         fi
-        FMT='{"body": "## CI Summary\n\n**Commit:** [`%s`](%s)\n**Branch:** `%s` → `%s`\n**Pipeline:** [View](%s)\n\n### Checks\n\n| Check | Status |\n|-------|--------|\n| Lint (ruff + isort) | ✅ |\n| Type check (mypy) | ✅ |\n| Unit tests | ✅ |\n| Integration tests | ✅ |\n| E2E tests | ✅ |\n| Coverage | **%s** |\n\n---\n*Reported by Woodpecker CI*"}'
-        BODY=$(printf "$FMT" "$SHA7" "$COMMIT_URL" "$SOURCE" "$TARGET" "$PIPELINE_URL" "$COVER")
+        FMT='{"body": "## CI Results\n\n| Check | Result |\n|-------|--------|\n| Commit | `%s` |\n| Branch | %s -> %s |\n| Coverage | **%s** |\n| Pipeline | [View](%s) |\n\n---\n*Reported by @cicd*"}'
+        BODY=$(printf "$FMT" "$SHA7" "$SOURCE" "$TARGET" "$COVER" "$PIPELINE_URL")
         curl -s -X POST "${CI_FORGE_URL}/api/v1/repos/${CI_REPO_OWNER}/${CI_REPO_NAME}/issues/${CI_COMMIT_PULL_REQUEST}/comments" -H "Authorization: token $${GITEA_API_TOKEN}" -H "Content-Type: application/json" --data-binary "$BODY"