refactor deployment config and exchange integrations

Simplify runtime configuration and remove legacy database and settings surface so new installs are easier to operate.
Refresh deployment assets, docs, and order execution behavior to keep the packaged app aligned with the current backend.

Made-with: Cursor

backend_api_python/app/services/live_trading/bitget.py

@@ -20,6 +20,17 @@ from app.services.live_trading.symbols import to_bitget_um_symbol
 
 
 class BitgetMixClient(BaseRestClient):
+    _CHANNEL_API_CODE_ORDER_PATHS = {
+        "/api/v2/mix/order/place-order",
+        "/api/v2/mix/order/batch-place-order",
+        "/api/v2/mix/order/modify-order",
+        "/api/v2/mix/order/place-plan-order",
+        "/api/v2/mix/order/place-tpsl-order",
+        "/api/v3/trade/place-order",
+        "/api/v3/trade/place-batch",
+        "/api/v3/trade/modify-order",
+    }
+
     def __init__(
         self,
         *,
@@ -28,11 +39,13 @@ class BitgetMixClient(BaseRestClient):
         passphrase: str,
         base_url: str = "https://api.bitget.com",
         timeout_sec: float = 15.0,
+        channel_api_code: str = "qvz9x",
     ):
         super().__init__(base_url=base_url, timeout_sec=timeout_sec)
         self.api_key = (api_key or "").strip()
         self.secret_key = (secret_key or "").strip()
         self.passphrase = (passphrase or "").strip()
+        self.channel_api_code = (channel_api_code or "").strip()
         if not self.api_key or not self.secret_key or not self.passphrase:
             raise LiveTradingError("Missing Bitget api_key/secret_key/passphrase")
 
@@ -172,14 +185,18 @@ class BitgetMixClient(BaseRestClient):
         mac = hmac.new(self.secret_key.encode("utf-8"), prehash.encode("utf-8"), hashlib.sha256).digest()
         return base64.b64encode(mac).decode("utf-8")
 
-    def _headers(self, ts_ms: str, sign: str) -> Dict[str, str]:
-        return {
+    def _headers(self, ts_ms: str, sign: str, request_path: str = "") -> Dict[str, str]:
+        headers = {
             "ACCESS-KEY": self.api_key,
             "ACCESS-SIGN": sign,
             "ACCESS-TIMESTAMP": ts_ms,
             "ACCESS-PASSPHRASE": self.passphrase,
             "Content-Type": "application/json",
         }
+        clean_path = str(request_path or "").split("?", 1)[0]
+        if self.channel_api_code and clean_path in self._CHANNEL_API_CODE_ORDER_PATHS:
+            headers["X-CHANNEL-API-CODE"] = self.channel_api_code
+        return headers
 
     def _signed_request(
         self,
@@ -210,7 +227,7 @@ class BitgetMixClient(BaseRestClient):
             path,
             params=params,
             data=body_str if body_str else None,
-            headers=self._headers(ts_ms, sign),
+            headers=self._headers(ts_ms, sign, path),
         )
         if code >= 400:
             raise LiveTradingError(f"Bitget HTTP {code}: {text[:500]}")