feat(storage): add Bitcask storage migration, binary WAL, and data compaction support

ts/ts_smartdb/server/SmartdbServer.ts

@@ -1,4 +1,5 @@
 import { RustDbBridge } from '../rust-db-bridge.js';
+import { StorageMigrator } from '../../ts_migration/index.js';
 import type {
   IOpLogEntry,
   IOpLogResult,
@@ -75,6 +76,12 @@ export class SmartdbServer {
       throw new Error('Server is already running');
     }
 
+    // Run storage migration for file-based storage before starting Rust engine
+    if (this.options.storage === 'file' && this.options.storagePath) {
+      const migrator = new StorageMigrator(this.options.storagePath);
+      await migrator.run();
+    }
+
     const spawned = await this.bridge.spawn();
     if (!spawned) {
       throw new Error(