chore: move observers arg in p2p-webrtc example; add deprecated to in line comments

examples/p2p-webrtc/video-transform/server/bot.py

@@ -122,8 +122,8 @@ async def run_bot(webrtc_connection):
         pipeline,
         params=PipelineParams(
             allow_interruptions=True,
-            observers=[RTVIObserver(rtvi)],
         ),
+        observers=[RTVIObserver(rtvi)],
     )
 
     @rtvi.event_handler("on_client_ready")

src/pipecat/pipeline/task.py

@@ -55,7 +55,7 @@ class PipelineParams(BaseModel):
         enable_metrics: Whether to enable metrics collection.
         enable_usage_metrics: Whether to enable usage metrics.
         heartbeats_period_secs: Period between heartbeats in seconds.
-        observers: List of observers for monitoring pipeline execution.
+        observers: [deprecated] Use `observers` arg in `PipelineTask` class.
         report_only_initial_ttfb: Whether to report only initial time to first byte.
         send_initial_empty_metrics: Whether to send initial empty metrics.
         start_metadata: Additional metadata for pipeline start.