Run #3354

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Tu es un agent de monitoring du pool agencecom.

Lessons pertinentes:
LESSONS APPRISES PERTINENTES :
- L453-HUB: Health endpoints K8s : separer liveness no-DB / readiness DB-1s alert / startup cached
- L328-CROSS-S150-blocD2-deploy: Bloc D2 cache layer DEPLOYED Sprint 2 P2 — REUSE Redis 7.0.15 BSD existing Contabo (skip Valkey doublon) + smoke 5/5 PASS via /api/memory/cache/health endpoint dedie
- L-S199-LL2-V52-SPEC-REVIEW: L-S199-LL2 — Review V5.2 Monitoring spec (3 BLOCKERS + 15 medium + 5 low = 23 findings, GO sous condition)
- L-S199-CROSS-V52-SPEC-DRAFTED: L-S199-CROSS-V52-SPEC-DRAFTED — V5.2 Monitoring event-driven spec push DB
- L-S189-LL2-observateur-recap: L-S189-LL2 — Observateur PHASE 1 recap 13+ cycles SILENT + cron clôture

Donnees pool actuelles:
[missing:pool_status]

CONTRAINTE STRICTE -- Tables autorisees UNIQUEMENT :
- agencecom.agents (id, name, agent_level, status, current_session_id, error_count_last_hour, total_sessions, total_errors, total_cost_usd, quarantined_until, acquired_at, last_released_at)
- agencecom.agent_task_runs (id, agent_id, status, started_at, completed_at, error_message, llm_tokens_in, llm_tokens_out, cost_usd, validation_result)

Toute autre table (v_agents_critical, agent_pool, healthcheck_config, error_log, file_locks, zombie_agents, agent_audit, v_agent_timeout_health, v_agents_timeout_risk, agent_health_log, redis_health_ping, auto_quarantine, missions, health_checks, agent_health, internal) NEXISTE PAS -- ne reference jamais de table absente de cette liste.

Identifie les agents zombies (busy >1h sans completion via started_at + status), error_count_last_hour > 5, ou drift quarantine (quarantined_until > now).
Donne 3 recommandations concretes en markdown bullet points avec actions SQL utilisant SEULEMENT les 2 tables autorisees ci-dessus.

- **Détection des zombies (tâches >1h sans terminaison)**  
  ```sql
  SELECT a.id AS agent_id, a.name, r.id AS task_run_id, r.started_at
  FROM agencecom.agents a
  JOIN agencecom.agent_task_runs r ON a.id = r.agent_id
  WHERE r.status = 'busy'
    AND r.started_at < NOW() - INTERVAL '1 hour'
    AND r.completed_at IS NULL;
  ```  
  *Action* : Mettre fin à ces tâches (status = 'failed') et repasser l’agent en `idle` (ou le marquer comme `error` si récurrent).

- **Agents à taux d’erreur critique (dernière heure)**  
  ```sql
  SELECT id, name, error_count_last_hour
  FROM agencecom.agents
  WHERE error_count_last_hour > 5;
  ```  
  *Action* : Placer immédiatement ces agents en quarantaine (`status = 'quarantined'`, `quarantined_until = NOW() + INTERVAL '30 minutes'`) et investiguer la cause (logs applicatifs).

- **Correction de la dérive de quarantaine (quarantined_until > NOW)**  
  ```sql
  SELECT id, name, quarantined_until, status
  FROM agencecom.agents
  WHERE (quarantined_until > NOW() AND status != 'quarantined')
     OR (quarantined_until <= NOW() AND status = 'quarantined');
  ```  
  *Action* : Pour les agents dont la quarantaine est active mais le statut incorrect, forcer `status = 'quarantined'`. Pour ceux dont la quarantaine est expirée mais bloqués en `quarantined`, repasser en `idle` et effacer `quarantined_until`.