feat: add GitHub repository dashboard with Prometheus metrics

ghtracker authenticates as a GitHub App and scans a configured list of repositories on a schedule. It serves a dashboard, a JSON state endpoint, a health probe and Prometheus metrics.

The dashboard lists only items that need attention: failing workflows, pull requests that wait too long or fail their checks, stale issues and projects that failed to scan. It has search, dynamic filters and a button that rescans on demand. The Vue app is embedded in the Go binary.

The client protects the GitHub rate limit with conditional requests, a request reserve and Retry-After handling.

.github/workflows/ci.yaml

@@ -0,0 +1,30 @@
+name: Pull request checks
+
+on:
+  pull_request:
+
+permissions:
+  contents: read
+  pull-requests: write
+  security-events: write
+
+jobs:
+  go:
+    uses: lukaszraczylo/shared-actions/.github/workflows/go-pr.yaml@main
+    with:
+      go-version: '>=1.24'
+    secrets: inherit
+
+  ui:
+    name: UI checks
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 22
+      - run: npx --yes [email protected] install --frozen-lockfile
+      - run: npx --yes [email protected] lint
+      - run: npx --yes [email protected] typecheck
+      - run: npx --yes [email protected] test

.github/workflows/release.yaml

@@ -0,0 +1,23 @@
+name: Test, build, release
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+      - '.github/workflows/ci.yaml'
+
+permissions:
+  id-token: write
+  contents: write
+  packages: write
+
+jobs:
+  release:
+    uses: lukaszraczylo/shared-actions/.github/workflows/go-release.yaml@main
+    with:
+      go-version: '>=1.24'
+      docker-enabled: true
+    secrets: inherit