fix: align Phase 2 inactivity bot with paginated last-commit detection

Signed-off-by: Akshat Kumar <akshat230405@gmail.com>

Author: Akshat8510

.github/scripts/dry_run_inactivity_unassign_phase2.sh

@@ -93,12 +93,11 @@ for ISSUE in $ISSUES; do
         continue
       fi
 
-      # Use the same "max by timestamp" logic as the real bot
-      COMMITS_JSON=$(gh api "repos/$REPO/pulls/$PR_NUM/commits" 2>/dev/null || echo "")
+      # Use the same "last commit" logic as the real bot (with pagination)
+      COMMITS_JSON=$(gh api "repos/$REPO/pulls/$PR_NUM/commits" --paginate 2>/dev/null || echo "")
 
       LAST_COMMIT_DATE=$(echo "$COMMITS_JSON" \
-        | jq -r 'max_by(.commit.committer.date // .commit.author.date)
-                 | (.commit.committer.date // .commit.author.date)' 2>/dev/null || echo "")
+        | jq -r 'last | (.commit.committer.date // .commit.author.date)' 2>/dev/null || echo "")
 
       if [ -z "$LAST_COMMIT_DATE" ] || [ "$LAST_COMMIT_DATE" = "null" ]; then
         echo "    [WARN] Could not determine last commit date for PR #$PR_NUM, skipping."

.github/scripts/inactivity_unassign_phase2.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+# Inactivity Unassign Bot (Phase 2 - PR inactivity)
 # Env:
 #   GH_TOKEN  - provided by GitHub Actions
 #   REPO      - owner/repo (fallback to GITHUB_REPOSITORY)
@@ -94,15 +95,11 @@ for ISSUE in $ISSUES; do
         continue
       fi
 
-      # Last commit date on the PR: pick the truly latest by timestamp
-      COMMITS_JSON=$(gh api "repos/$REPO/pulls/$PR_NUM/commits" --paginate 2>/dev/null || echo "[]")
+      # Last commit date on the PR (use API order + paginate, take last)
+      COMMITS_JSON=$(gh api "repos/$REPO/pulls/$PR_NUM/commits" --paginate 2>/dev/null || echo "")
 
       LAST_COMMIT_DATE=$(echo "$COMMITS_JSON" \
-        | jq -r '
-            select(length > 0)
-            | max_by(.commit.committer.date // .commit.author.date)
-            | (.commit.committer.date // .commit.author.date)
-          ')
+        | jq -r 'last | (.commit.committer.date // .commit.author.date)' 2>/dev/null || echo "")
 
       if [ -z "$LAST_COMMIT_DATE" ] || [ "$LAST_COMMIT_DATE" = "null" ]; then
         echo "    [WARN] Could not determine last commit date for PR #$PR_NUM, skipping."