In OpenAI/Azure Realtime examples, migrate to settings=OpenAIRealtimeLLMSettings(...) pattern

Move `session_properties` and `system_instruction` into the `settings` arg, matching the canonical pattern used across the codebase.

examples/foundational/20b-persistent-context-openai-realtime.py

@@ -33,7 +33,10 @@ from pipecat.services.openai.realtime.events import (
     SessionProperties,
     TurnDetection,
 )
-from pipecat.services.openai.realtime.llm import OpenAIRealtimeLLMService
+from pipecat.services.openai.realtime.llm import (
+    OpenAIRealtimeLLMService,
+    OpenAIRealtimeLLMSettings,
+)
 from pipecat.transports.base_transport import BaseTransport, TransportParams
 from pipecat.transports.daily.transport import DailyParams
 from pipecat.transports.websocket.fastapi import FastAPIWebsocketParams
@@ -173,19 +176,10 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
 
     stt = DeepgramSTTService(api_key=os.getenv("DEEPGRAM_API_KEY"))
 
-    session_properties = SessionProperties(
-        audio=AudioConfiguration(
-            input=AudioInput(
-                transcription=InputAudioTranscription(),
-                # Set openai TurnDetection parameters. Not setting this at all will turn it
-                # on by default
-                turn_detection=TurnDetection(silence_duration_ms=1000),
-                # Or set to False to disable openai turn detection and use transport VAD
-                # turn_detection=False,
-            )
-        ),
-        # tools=tools,
-        instructions="""Your knowledge cutoff is 2023-10. You are a helpful and friendly AI.
+    llm = OpenAIRealtimeLLMService(
+        api_key=os.getenv("OPENAI_API_KEY"),
+        settings=OpenAIRealtimeLLMSettings(
+            system_instruction="""Your knowledge cutoff is 2023-10. You are a helpful and friendly AI.
 
 Act like a human, but remember that you aren't a human and that you can't do human
 things in the real world. Your voice and personality should be warm and engaging, with a lively and
@@ -199,11 +193,20 @@ You are participating in a voice conversation. Keep your responses concise, shor
 unless specifically asked to elaborate on a topic.
 
 Remember, your responses should be short. Just one or two sentences, usually.""",
-    )
-
-    llm = OpenAIRealtimeLLMService(
-        api_key=os.getenv("OPENAI_API_KEY"),
-        session_properties=session_properties,
+            session_properties=SessionProperties(
+                audio=AudioConfiguration(
+                    input=AudioInput(
+                        transcription=InputAudioTranscription(),
+                        # Set openai TurnDetection parameters. Not setting this at all will turn it
+                        # on by default
+                        turn_detection=TurnDetection(silence_duration_ms=1000),
+                        # Or set to False to disable openai turn detection and use transport VAD
+                        # turn_detection=False,
+                    )
+                ),
+                # tools=tools,
+            ),
+        ),
     )
 
     # you can either register a single function for all function calls, or specific functions