feat(Trades): refactor trades MQTT client and DTOs

FinlyticTrades/Project.md

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+# Finlytic Trades Service
+
+Finlytic Trades is a C# microservice managing the full lifecycle of automated trade signals and positions. It handles proposed trade validation, position tracking, TTL expiration, hourly performance updates, and trade closure.
+
+---
+
+## Core Modules & Architecture
+
+1. **Trade Lifecycle Engine (`ITradeLifecycleService`)**:
+   - Ingests trade proposals (`TradeProposalDto`), validates parameters (Entry, Stop Loss, Take Profit, Win Rate, Risk Tolerance), and tracks positions through `Active`, `Closed`, `Expired`, or `Cancelled` states.
+
+2. **TTL Worker Service (`TtlWorkerService`)**:
+   - Periodically checks active trades against Time-To-Live (`TtlMinutes`) constraints and automatically expires stale trades.
+
+3. **Feedback Exporter Engine (`FeedbackExporterEngine`)**:
+   - Exports trade outcome data (`TradeFeedbackRecord`) for AI model retraining and win-rate calibration.
+
+4. **MQTT RPC & Event Communication**:
+   - Subscribes to `finlytic/trades/proposed/#` and `finlytic/trades/updates/#`.
+   - Handles RPC requests on `finlytic/trades/get_active/request` and `finlytic/trades/close/request/#`.
+   - Publishes position updates to `finlytic/trades/update` and `finlytic/trades/get_active/response`.
+
+---
+
+## Feature Status
+
+### Implemented Features
+- [x] Full Trade Lifecycle Management (`TradesDbContext` with PostgreSQL indexes).
+- [x] Automated TTL Expiration Worker (`TtlWorkerService`).
+- [x] AI Feedback Record Exporter (`FeedbackExporterEngine`).
+- [x] Pure Worker Service Architecture (`Host.CreateApplicationBuilder`, Kestrel HTTP server removed).
+- [x] Zero-Allocation MQTT RPC handlers for active trades & trade closure.
+
+### Planned Features
+- [ ] Automated Trailing Stop Loss adjustment engine based on ATR (Average True Range).
+- [ ] Direct Broker API Execution integration (Trade Republic / Interactive Brokers automated order placement).