fix: reduce pg-boss pool size to 4, add idle_in_transaction_session_timeout

PostgreSQL max_connections was being exceeded (100/100).
- Limit pg-boss internal pool to 4 connections
- Added idle_in_transaction_session_timeout=30s to PostgreSQL config
- Already raised max_connections to 300 (container config)
System now stable at ~98/300 connections

packages/scraper/src/scheduler.ts

@@ -51,7 +51,9 @@ export async function createScheduler(): Promise<PgBoss> {
     retryDelay: 30,
     retryBackoff: true,
     expireInSeconds: 300,
-    monitorStateIntervalSeconds: 30,
+    monitorStateIntervalSeconds: 60,
+    max: 4,          // pg-boss internal connection pool
+    poolSize: 4,     // alias used by some pg-boss versions
   });
 
   boss.on("error", (error) => console.error("pg-boss error:", error));