feat(agent): hierarchical executor with path resolve, runtime probe, quiet UI

Make Zed Agent closer to Cursor: deterministic DevOps path index, live Traefik
port probe before blind edits, stop-after-edit, and quieter Russian progress.

scripts/diag-executor-fail.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+ssh -o BatchMode=yes eventhub-ift bash -s <<'REMOTE'
+set -euo pipefail
+cd /opt/ai-router-stack
+set -a; source .env; set +a
+PG=$(docker ps -q -f name=ai-router_postgres | head -1)
+
+echo "== Spend last 30m =="
+docker exec -e PGPASSWORD="$POSTGRES_PASSWORD" "$PG" \
+  psql -U "${POSTGRES_USER:-litellm}" -d "${POSTGRES_DB:-litellm}" -c "
+SELECT \"startTime\", status, model, call_type, total_tokens,
+       left(coalesce(metadata->'error_information'->>'error_message',''), 180) AS er
+FROM \"LiteLLM_SpendLogs\"
+ORDER BY \"startTime\" DESC
+LIMIT 25;
+"
+
+echo "== Router logs (executor/plan) =="
+docker service logs --since 25m ai-router_router 2>&1 \
+  | grep -iE 'hierarchical|executor|novita-planner|a-medium-code|timeout|408|error|fail|tool' \
+  | tail -50
+
+echo "== LiteLLM logs errors =="
+docker service logs --since 25m ai-router_litellm 2>&1 \
+  | grep -iE 'ERROR|Exception|timeout|408|502|qwen3-coder|novita-planner|a-medium-code|Give Feedback' \
+  | tail -40
+REMOTE