Inline local-smart-turn-v3 deps for Poetry compatibility

Replace self-referential `pipecat-ai[local-smart-turn-v3]` extra in core
dependencies with the actual packages (`transformers`, `onnxruntime`).
Self-referential extras are not supported by Poetry and cause dependency
resolution failures. Since these are required by the default turn stop
strategy (LocalSmartTurnAnalyzerV3), they belong in core dependencies.

- Remove `local-smart-turn-v3` optional extra from pyproject.toml
- Remove try/except ModuleNotFoundError guard (now always installed)
- Remove `--extra local-smart-turn-v3` from CI workflows

src/pipecat/audio/turn/smart_turn/local_smart_turn_v3.py

@@ -13,21 +13,13 @@ local end-of-turn detection without requiring network connectivity.
 from typing import Any, Dict, Optional
 
 import numpy as np
+import onnxruntime as ort
 from loguru import logger
+from transformers import WhisperFeatureExtractor
 
 from pipecat.audio.turn.smart_turn.base_smart_turn import BaseSmartTurn
 from pipecat.utils.env import env_truthy
 
-try:
-    import onnxruntime as ort
-    from transformers import WhisperFeatureExtractor
-except ModuleNotFoundError as e:
-    logger.error(f"Exception: {e}")
-    logger.error(
-        "In order to use LocalSmartTurnAnalyzerV3, you need to `pip install pipecat-ai[local-smart-turn-v3]`."
-    )
-    raise Exception(f"Missing module: {e}")
-
 
 class LocalSmartTurnAnalyzerV3(BaseSmartTurn):
     """Local turn analyzer using the smart-turn-v3 ONNX model.