feat: Add centralized logging system with @link-stack/logger package

- Create new @link-stack/logger package wrapping Pino for structured logging
- Replace all console.log/error/warn statements across the monorepo
- Configure environment-aware logging (pretty-print in dev, JSON in prod)
- Add automatic redaction of sensitive fields (passwords, tokens, etc.)
- Remove dead commented-out logger file from bridge-worker
- Follow Pino's standard argument order (context object first, message second)
- Support log levels via LOG_LEVEL environment variable
- Export TypeScript types for better IDE support

This provides consistent, structured logging across all applications
and packages, making debugging easier and production logs more parseable.

apps/bridge-worker/tasks/leafcutter/import-leafcutter.ts

@@ -2,6 +2,9 @@
 /*
 import { URLSearchParams } from "url";
 import { withDb, AppDatabase } from "../../lib/db.js";
+import { createLogger } from "@link-stack/logger";
+
+const logger = createLogger('bridge-worker-import-leafcutter');
 // import { loadConfig } from "@digiresilience/bridge-config";
 
 const config: any = {};
@@ -122,7 +125,7 @@ const sendToLeafcutter = async (tickets: LabelStudioTicket[]) => {
     };
   });
 
-  console.info("Sending to Leafcutter");
+  logger.info("Sending to Leafcutter");
 
   const result = await fetch(opensearchApiUrl, {
     method: "POST",