feat(transactions): add single-node transaction support with session-aware reads, commits, aborts, and transaction metrics

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartdb',
-  version: '2.7.1',
+  version: '2.8.0',
   description: 'A MongoDB-compatible embedded database server with wire protocol support, backed by a high-performance Rust engine.'
 }

ts/ts_smartdb/rust-db-bridge.ts

@@ -76,6 +76,10 @@ export interface ISmartDbMetrics {
   collections: number;
   oplogEntries: number;
   oplogCurrentSeq: number;
+  sessions: number;
+  activeTransactions: number;
+  authEnabled: boolean;
+  authUsers: number;
   uptimeSeconds: number;
 }