Allow base_url in SGP tracer (#149)

* allow base_url in sgp tracer

* consistent naming

Author: erichwoo-scale

src/agentex/lib/core/tracing/processors/sgp_tracing_processor.py

@@ -21,7 +21,11 @@ class SGPSyncTracingProcessor(SyncTracingProcessor):
     def __init__(self, config: SGPTracingProcessorConfig):
         disabled = config.sgp_api_key == "" or config.sgp_account_id == ""
         tracing.init(
-            SGPClient(api_key=config.sgp_api_key, account_id=config.sgp_account_id),
+            SGPClient(
+                api_key=config.sgp_api_key, 
+                account_id=config.sgp_account_id,
+                base_url=config.sgp_base_url,
+            ),
             disabled=disabled,
         )
         self._spans: dict[str, SGPSpan] = {}

src/agentex/lib/types/tracing.py

@@ -26,6 +26,7 @@ class SGPTracingProcessorConfig(BaseModel):
     type: Literal["sgp"] = "sgp"
     sgp_api_key: str
     sgp_account_id: str
+    sgp_base_url: str | None = None
 
 
 TracingProcessorConfig = Annotated[