feat(hub): add symbol archive with permanent 5m klines

Add /archive page, hub_symbol_archive.db, trade overlay, 4h background sync, and instance /api/hub/trades/archive. Document in hub-symbol-archive-kline.md with cross-links.

Co-authored-by: Cursor <cursoragent@cursor.com>

hub_bridge.py

@@ -418,6 +418,52 @@ def register_hub_routes(app):
             )
         )
 
+    @app.route("/api/hub/trades/archive")
+    @_hub_auth_required
+    def api_hub_trades_archive():
+        """中控币种档案：近 N 天已平仓记录。"""
+        from hub_trades_lib import fetch_trades_for_archive, summarize_trades
+
+        c = _ctx()
+        get_db = c.get("get_db")
+        if not get_db:
+            return jsonify({"ok": False, "msg": "HUB_CTX 缺少 get_db"}), 500
+        try:
+            days = int(request.args.get("days") or "365")
+        except ValueError:
+            days = 365
+        try:
+            limit = int(request.args.get("limit") or "2000")
+        except ValueError:
+            limit = 2000
+        try:
+            import os
+
+            reset_hour = int(os.getenv("TRADING_DAY_RESET_HOUR", "8") or "8")
+        except ValueError:
+            reset_hour = 8
+        conn = get_db()
+        try:
+            trades = fetch_trades_for_archive(
+                conn,
+                days=days,
+                row_to_dict_fn=c.get("row_to_dict"),
+                reset_hour=reset_hour,
+                limit=limit,
+            )
+        finally:
+            conn.close()
+        stats = summarize_trades(trades)
+        return jsonify(
+            {
+                "ok": True,
+                "days": max(1, min(days, 3650)),
+                "trading_day_reset_hour": reset_hour,
+                "trades": trades,
+                "stats": stats,
+            }
+        )
+
     @app.route("/api/hub/trades/today")
     @_hub_auth_required
     def api_hub_trades_today():