Improve broker read auth diagnostics

src/services/broker/broker_read_model_service.py

@@ -203,18 +203,27 @@ class BrokerReadModelService:
             client_kwargs["proxy"] = self.proxy_url
             client_kwargs["trust_env"] = False
         with httpx.Client(**client_kwargs) as client:
-            response = client.get(
-                f"{self.base_url}{path}",
-                params=params,
-                headers={
-                    "OK-ACCESS-KEY": api_key,
-                    "OK-ACCESS-SIGN": signature,
-                    "OK-ACCESS-TIMESTAMP": timestamp,
-                    "OK-ACCESS-PASSPHRASE": api_passphrase,
-                    "Content-Type": "application/json",
-                },
-            )
-            response.raise_for_status()
+            try:
+                response = client.get(
+                    f"{self.base_url}{path}",
+                    params=params,
+                    headers={
+                        "OK-ACCESS-KEY": api_key,
+                        "OK-ACCESS-SIGN": signature,
+                        "OK-ACCESS-TIMESTAMP": timestamp,
+                        "OK-ACCESS-PASSPHRASE": api_passphrase,
+                        "Content-Type": "application/json",
+                    },
+                )
+                response.raise_for_status()
+            except httpx.HTTPStatusError as exc:
+                body = exc.response.text
+                try:
+                    payload = exc.response.json()
+                    body = f"{payload.get('code')}:{payload.get('msg')}" if isinstance(payload, dict) else body
+                except Exception:
+                    pass
+                raise ValueError(f"okx_read_http_{exc.response.status_code}:{body}") from exc
             payload = response.json()
         if not isinstance(payload, dict):
             raise ValueError("okx_read_invalid_payload")