test: verify sampling parameters through the full governance stack

src/polygateway/middleware/telemetry.py

@@ -29,7 +29,7 @@ if TYPE_CHECKING:
 
 
 class TelemetryEmitter:
-    """从请求与结果组装 20 字段并写入 recorder;一切写失败降级 warning。"""
+    """从请求与结果组装 21 字段并写入 recorder;一切写失败降级 warning。"""
 
     def __init__(self, recorder: TelemetryRecorder, *, pricing: PricingTable | None = None) -> None:
         self._recorder = recorder
@@ -65,9 +65,7 @@ class TelemetryEmitter:
             cached_prompt_tokens=response.cached_prompt_tokens if response else None,
             model_reported=response.model_reported if response else None,
             # 唯一有"生效源"的入口,故是唯一能并上 extra_body 的(设计决策 D)
-            sampling=canonical_sampling_json(
-                merge_sampling(source.extra_body, request.sampling)
-            ),
+            sampling=canonical_sampling_json(merge_sampling(source.extra_body, request.sampling)),
         )
 
     async def emit_cache_hit(self, *, request: ChatRequest, response: LLMResponse) -> None: