fix: fix: dev-poll should abandon stale branches that are behind main (#148)

dev/dev-poll.sh

@@ -355,8 +355,8 @@ if [ "$ORPHAN_COUNT" -gt 0 ]; then
       # Reset to fresh start on primary branch
       git -C "${PROJECT_REPO_ROOT:-}" checkout "${PRIMARY_BRANCH}" 2>/dev/null || true
       git -C "${PROJECT_REPO_ROOT:-}" pull --ff-only origin "${PRIMARY_BRANCH}" 2>/dev/null || true
-      # Exit to restart poll cycle (issue will be picked up fresh)
-      exit 0
+      # Continue to next orphan (don't spawn agent for stale PR)
+      continue
     fi
 
     PR_SHA=$(curl -sf -H "Authorization: token ${FORGE_TOKEN}" \