feat: DSA full integration — mo_bridge v2 + strategy_lifecycle injection

mo_bridge.py (rewrite):
- get_stock_news(): DSA SearchService 7 engines → MoFin analysis context
- get_market_review(): DSA run_market_review() with 24h cache
- get_stock_analysis(): DSA AgentExecutor.run() with 15 strategies
- enrich_analysis_context(): one-call context injection

strategy_lifecycle.py:
- reassess_with_context() now injects DSA market + news context
- Auto-detects HK vs A-share region for market review
- Graceful fallback if DSA unavailable

strategy_lifecycle.py

@@ -1282,6 +1282,17 @@ def reassess_with_context(code, name, price, cost, shares, current_action,
         news_sentiment = {}
         fund = {}
 
+    # ── DSA 集成：注入大盘复盘 + 新闻情报 ──────────────────────────
+    try:
+        from mo_bridge import enrich_analysis_context
+        region = "hk" if len(str(code)) == 5 and str(code)[0] in ('0','1') else "cn"
+        dsa_ctx = enrich_analysis_context(stock_code=code, stock_name=name,
+                                          region=region, include_news=True)
+        if dsa_ctx:
+            macro_desc = (macro_desc + "\n\n" + dsa_ctx).strip()
+    except Exception:
+        pass  # DSA 不可用时静默跳过
+
     enriched, factors = enrich_timing_signal(
         base_signal=result.get("timing_signal", ""),
         macro_desc=macro_desc,