feat: add dynamic configuration hot-reloading using FS watcher

[realkalashnikov]

Description

This PR implements a dynamic configuration hot-reloading mechanism for NodeLink. It allows users to modify config.ts or config.js in the root directory and apply changes in real-time across the Master server and all cluster Worker processes without requiring a physical restart, preserving active audio streams and 99.9% uptime.

Key Changes

• Dynamic Loading & Cache Busting: Modified the loadConfig function to optionally support a timestamp query parameter for ESM dynamic imports, bypassing Node.js module loader caching.
• FS Watcher: Added a debounced (200ms) directory-level fs.watch looking for config.ts/config.js updates during Master/Single process bootstrap.
• Master Re-initialization: When configuration changes:
  • Re-applies environment overrides.
  • Re-initializes logger options.
  • Dynamically triggers folder reloads on active managers (sources, lyrics, meanings).
• IPC Propagation: Added an updateConfig method to WorkerManager that updates its local scaling properties/timeouts and broadcasts { type: 'updateConfig', payload: newConfig } IPC messages to all active child cluster workers.
• Worker Refresh: Cluster workers listen to the IPC update event, refresh local config states, and reload their respective active audio source/lyrics/meanings directories in-place.

Testing

• Verified TypeScript compiler checks locally via npm run type-check (compiles successfully without type errors).
• Verified that ESM modules reload properly with dynamic parameters.

[github-actions]

All Contributors have signed the CLA. The PR is now allowed to be merged.
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[realkalashnikov]

I have read the CLA Document and I hereby sign the CLA

[realkalashnikov]

I forgot to switch branches 🤓