ci: Add auto-approve workflow for owner PRs without review

Adds a daily scheduled workflow (08:00 UTC, also manual trigger) that
auto-approves open PRs from repo OWNER/MEMBER after 3 days without review.

Countdown labels give reviewers clear visibility:
  Day 0 -> merge-in-3-days-without-review
  Day 1 -> merge-in-2-days-without-review
  Day 2 -> merge-in-1-day-without-review
  Day 3 -> approved + merged-without-review (auto-merge takes over)

PRs that already have an approving review are skipped.

Author: mPokornyETM

.github/workflows/auto-approve-owner-prs.yml

@@ -0,0 +1,115 @@
+# Auto-approve owner PRs that receive no review within 3 days.
+#
+# Countdown labels give reviewers clear visibility:
+#   Day 0 → merge-in-3-days-without-review
+#   Day 1 → merge-in-2-days-without-review
+#   Day 2 → merge-in-1-day-without-review
+#   Day 3 → approved + merged-without-review  (auto-merge takes over)
+#
+# Only PRs authored by a repo OWNER or MEMBER are processed.
+# PRs that already have at least one approval are skipped.
+name: Auto-approve owner PRs
+
+on:
+  schedule:
+    - cron: "0 8 * * *" # daily at 08:00 UTC
+  workflow_dispatch: # allow manual trigger
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  countdown:
+    runs-on: ubuntu-latest
+    steps:
+      # ── 1. Ensure countdown labels exist ──────────────────────────
+      - name: Create countdown labels (idempotent)
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          declare -A LABELS=(
+            ["merge-in-3-days-without-review"]="c2e0c6"
+            ["merge-in-2-days-without-review"]="fbca04"
+            ["merge-in-1-day-without-review"]="e99695"
+            ["merged-without-review"]="d93f0b"
+          )
+          for label in "${!LABELS[@]}"; do
+            gh label create "$label" \
+              --color "${LABELS[$label]}" \
+              --description "Auto-approve countdown" \
+              --force 2>/dev/null || true
+          done
+
+      # ── 2. Process open PRs by owner/member ───────────────────────
+      - name: Run countdown on stale owner PRs
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REPO: ${{ github.repository }}
+        run: |
+          COUNTDOWN_LABELS=(
+            "merge-in-3-days-without-review"
+            "merge-in-2-days-without-review"
+            "merge-in-1-day-without-review"
+            "merged-without-review"
+          )
+
+          remove_countdown_labels() {
+            local pr=$1
+            for lbl in "${COUNTDOWN_LABELS[@]}"; do
+              gh pr edit "$pr" --remove-label "$lbl" 2>/dev/null || true
+            done
+          }
+
+          # Fetch open PRs authored by OWNER or MEMBER
+          prs=$(gh api "repos/${REPO}/pulls?state=open&per_page=100" \
+            --jq '.[] | select(.author_association == "OWNER" or .author_association == "MEMBER" or .draft == false) | select(.draft == false) | {number: .number, created_at: .created_at, user: .user.login, author_association: .author_association}')
+
+          # Filter to only OWNER/MEMBER (the jq above might pass non-owner non-draft)
+          prs=$(echo "$prs" | jq -s '[.[] | select(.author_association == "OWNER" or .author_association == "MEMBER")]' | jq -c '.[]')
+
+          if [ -z "$prs" ]; then
+            echo "No open PRs by owner/member found."
+            exit 0
+          fi
+
+          echo "$prs" | while IFS= read -r pr; do
+            PR_NUMBER=$(echo "$pr" | jq -r '.number')
+            CREATED_AT=$(echo "$pr" | jq -r '.created_at')
+            AUTHOR=$(echo "$pr" | jq -r '.user')
+            ASSOC=$(echo "$pr" | jq -r '.author_association')
+
+            # Skip if PR already has an approving review
+            APPROVALS=$(gh api "repos/${REPO}/pulls/${PR_NUMBER}/reviews" \
+              --jq '[.[] | select(.state == "APPROVED")] | length')
+            if [ "$APPROVALS" -gt 0 ]; then
+              echo "PR #${PR_NUMBER} already approved — skipping"
+              continue
+            fi
+
+            # Calculate age in whole days
+            CREATED_TS=$(date -d "$CREATED_AT" +%s)
+            NOW_TS=$(date +%s)
+            AGE_DAYS=$(( (NOW_TS - CREATED_TS) / 86400 ))
+
+            echo "PR #${PR_NUMBER} by ${AUTHOR} (${ASSOC}) — ${AGE_DAYS} day(s) old"
+
+            remove_countdown_labels "$PR_NUMBER"
+
+            if [ "$AGE_DAYS" -ge 3 ]; then
+              echo "  → Auto-approving PR #${PR_NUMBER}"
+              gh pr edit "$PR_NUMBER" --add-label "merged-without-review"
+              gh pr review "$PR_NUMBER" --approve \
+                --body "Auto-approved: no review received within 3 days of opening."
+              gh pr merge --auto --squash "$PR_NUMBER" || true
+            elif [ "$AGE_DAYS" -ge 2 ]; then
+              echo "  → Label: merge-in-1-day-without-review"
+              gh pr edit "$PR_NUMBER" --add-label "merge-in-1-day-without-review"
+            elif [ "$AGE_DAYS" -ge 1 ]; then
+              echo "  → Label: merge-in-2-days-without-review"
+              gh pr edit "$PR_NUMBER" --add-label "merge-in-2-days-without-review"
+            else
+              echo "  → Label: merge-in-3-days-without-review"
+              gh pr edit "$PR_NUMBER" --add-label "merge-in-3-days-without-review"
+            fi
+          done