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/lib/media-convert.ts

@@ -1,6 +1,9 @@
 import { Readable } from "stream";
 import ffmpeg from "fluent-ffmpeg";
 import * as R from "remeda";
+import { createLogger } from "@link-stack/logger";
+
+const logger = createLogger('bridge-worker-media-convert');
 
 const requiredCodecs = ["mp3", "webm", "wav"];
 
@@ -36,7 +39,7 @@ export const convert = (
       .audioBitrate(settings.bitrate)
       .toFormat(settings.format)
       .on("error", (err, _stdout, _stderr) => {
-        console.error(err.message);
+        logger.error({ error: err }, 'FFmpeg conversion error');
         reject(err);
       })
       .on("end", () => {
@@ -58,7 +61,7 @@ export const selfCheck = (): Promise<boolean> => {
   return new Promise((resolve) => {
     ffmpeg.getAvailableFormats((err, codecs) => {
       if (err) {
-        console.error("FFMPEG error:", err);
+        logger.error({ error: err }, 'FFMPEG error');
         resolve(false);
       }