fix(gateway): 适配器瞬时错误消息脱敏——只留类名+状态码不泄漏厂商响应体（CR-M2-2）

packages/llm_gateway/ww_llm_gateway/adapters/gemini.py

@@ -20,6 +20,7 @@ from .base import (
     ProviderUsage,
     StreamChunk,
     is_transient_by_name,
+    provider_error_summary,
 )
 
 _TRANSIENT_NAMES = frozenset(
@@ -103,7 +104,9 @@ class GeminiAdapter:
             )
         except Exception as exc:
             if _is_transient(exc):
-                raise TransientProviderError(str(exc), provider=self.provider) from exc
+                raise TransientProviderError(
+                    provider_error_summary(exc), provider=self.provider
+                ) from exc
             raise
         text = getattr(resp, "text", "") or ""
         usage = _usage_from(getattr(resp, "usage_metadata", None))
@@ -126,5 +129,7 @@ class GeminiAdapter:
                     yield StreamChunk(usage=_usage_from(meta))
         except Exception as exc:
             if _is_transient(exc):
-                raise TransientProviderError(str(exc), provider=self.provider) from exc
+                raise TransientProviderError(
+                    provider_error_summary(exc), provider=self.provider
+                ) from exc
             raise