Fix TypeScript compilation errors across P3-P6

- jwt.sign: explicit SignOptions cast for expiresIn (all 4 products)
- ioredis: use named import { Redis } instead of default (P4, P6)
- P4 catalog/service: fix import paths for aws-scanner and github-scanner
- P4 discovery: pass pool to ScheduledDiscovery constructor
- P6 agent-bridge: add explicit types for Redis message callback params
- All 4 Node products now compile cleanly with tsc --noEmit

products/04-lightweight-idp/src/discovery/scheduler.ts

@@ -1,5 +1,5 @@
 import pino from 'pino';
-import Redis from 'ioredis';
+import { Redis } from 'ioredis';
 import { Pool } from 'pg';
 import { AwsDiscoveryScanner } from './aws-scanner.js';
 import { GitHubDiscoveryScanner } from './github-scanner.js';