feat: Update PlaygroundPayload componentCount field to be nullable

The `PlaygroundPayload` class in the `telemetry/schema.py` module has been updated to make the `componentCount` field nullable by setting its default value to `None`. This change allows for more flexibility when handling the `componentCount` data in the telemetry service.

src/backend/base/langflow/services/telemetry/schema.py

@@ -1,4 +1,3 @@
-from os import error
 from pydantic import BaseModel
 
 
@@ -25,7 +24,7 @@ class VersionPayload(BaseModel):
 
 class PlaygroundPayload(BaseModel):
     seconds: int
-    componentCount: int
+    componentCount: int | None = None
     success: bool
     errorMessage: str = ""