fix(smartproxy): upgrade @push.rocks/smartproxy to ^23.1.0 and adapt code/tests for its async getStatistics() API

readme.hints.md

@@ -1,5 +1,28 @@
 # Implementation Hints and Learnings
 
+## Dependency Upgrade (2026-02-10)
+
+### SmartProxy v23.1.0 Upgrade
+- `@push.rocks/smartproxy`: 22.4.2 → 23.1.0
+
+**Key Changes:**
+- Rust-based proxy components for improved performance
+- Rust binary runs as separate process via IPC
+- `getStatistics()` now returns `Promise<any>` (was synchronous)
+- nftables-proxy removed (not used by dcrouter)
+
+**Code Changes Required:**
+```typescript
+// Old (synchronous)
+const proxyStats = this.dcRouter.smartProxy.getStatistics();
+
+// New (async)
+const proxyStats = await this.dcRouter.smartProxy.getStatistics();
+```
+
+**Files Modified:**
+- `ts/monitoring/classes.metricsmanager.ts` - Added `await` to `getStatistics()` call
+
 ## Dependency Upgrade (2026-02-01)
 
 ### Major Upgrades Completed