cli: implement local→CouchDB file watching via chokidar

- Add chokidar ^4.0.0 as dependency (root package.json, runtime-package.json)
- Mark chokidar as external in vite.config.ts (not bundled, loaded at runtime)
- Implement CLIWatchAdapter.beginWatch() with chokidar:
  - ignoreInitial: true (startup files handled by mirror scan)
  - awaitWriteFinish to prevent partial-write events
  - Excludes dotfiles and .livesync/ directory at watcher level
  - Maps add/change/unlink/addDir/unlinkDir to IStorageEventWatchHandlers
  - Fatal error handler: logs clearly and releases watcher resources
- Add close() to CLIWatchAdapter, StorageEventManagerCLI for clean shutdown
- Register onUnload hook in CLIServiceModules to close watcher on shutdown

src/apps/cli/adapters/NodeFileSystemAdapter.ts

@@ -39,12 +39,6 @@ export class NodeFileSystemAdapter implements IFileSystemAdapter<NodeFile, NodeF
 
     async getAbstractFileByPath(p: FilePath | string): Promise<NodeFile | null> {
         const pathStr = this.normalisePath(p);
-
-        const cached = this.fileCache.get(pathStr);
-        if (cached) {
-            return cached;
-        }
-
         return await this.refreshFile(pathStr);
     }