chore: add leaderboard scheduler workflow for calculating next country leaderboard

Author: O2sa

.github/workflows/leaderboard-scheduler.yml

@@ -0,0 +1,59 @@
+name: Leaderboard Scheduler
+
+on:
+  schedule:
+    - cron: "0 17 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: leaderboard-scheduler
+  cancel-in-progress: false
+
+jobs:
+  calculate-next-country:
+    name: Calculate next country leaderboard
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN_DEVIMPACT }}
+      DATABASE_URL: ${{ secrets.DATABASE_URL }}
+      LEADERBOARD_SOURCE_URL_TEMPLATE: ${{ vars.LEADERBOARD_SOURCE_URL_TEMPLATE || 'https://raw.githubusercontent.com/ashkulz/committers.top/gh-pages/_data/locations/{country}.yml' }}
+      GITHUB_REPO_COUNT: ${{ vars.GITHUB_REPO_COUNT || '50' }}
+      GITHUB_PR_COUNT: ${{ vars.GITHUB_PR_COUNT || '300' }}
+      GITHUB_ISSUE_COUNT: ${{ vars.GITHUB_ISSUE_COUNT || '100' }}
+      GITHUB_DISCUSSION_COUNT: ${{ vars.GITHUB_DISCUSSION_COUNT || '50' }}
+      REDIS_URL: ${{ secrets.REDIS_URL }}
+      REDIS_ENABLED: ${{ vars.REDIS_ENABLED || 'false' }}
+      REDIS_PASSWORD: ${{ secrets.REDIS_PASSWORD }}
+      REDIS_CACHE_NAMESPACE: ${{ vars.REDIS_CACHE_NAMESPACE || 'devimpact:v1' }}
+      REDIS_CACHE_TTL_SECONDS: ${{ vars.REDIS_CACHE_TTL_SECONDS || '604800' }}
+      REDIS_CONNECT_TIMEOUT_MS: ${{ vars.REDIS_CONNECT_TIMEOUT_MS || '1500' }}
+      LEADERBOARD_SEED_LIMIT: ${{ vars.LEADERBOARD_SEED_LIMIT || '256' }}
+      LEADERBOARD_REFRESH_LIMIT: ${{ vars.LEADERBOARD_REFRESH_LIMIT || '500' }}
+      LEADERBOARD_USER_STALE_DAYS: ${{ vars.LEADERBOARD_USER_STALE_DAYS || '30' }}
+      GITHUB_USER_STALE_DAYS: ${{ vars.GITHUB_USER_STALE_DAYS || '14' }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.29.2
+          run_install: false
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24.x
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Calculate next country
+        run: pnpm leaderboard:calculate