Fix circular dependency in voice streamed example with cleaner import pattern

examples/voice/streamed/main.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import asyncio
+from typing import TYPE_CHECKING
 
 import numpy as np
 import sounddevice as sd
@@ -13,13 +14,18 @@ from typing_extensions import override
 
 from agents.voice import StreamedAudioInput, VoicePipeline
 
-# Use absolute or relative import based on context
-if __name__ == "__main__":
-    # When running as script, use absolute import
-    from my_workflow import MyWorkflow  # type: ignore
-else:
-    # When imported as module, use relative import
+# Import MyWorkflow class - handle both module and package use cases
+if TYPE_CHECKING:
+    # For type checking, use the relative import
     from .my_workflow import MyWorkflow
+else:
+    # At runtime, try both import styles
+    try:
+        # Try relative import first (when used as a package)
+        from .my_workflow import MyWorkflow
+    except ImportError:
+        # Fall back to direct import (when run as a script)
+        from my_workflow import MyWorkflow
 
 CHUNK_LENGTH_S = 0.05  # 100ms
 SAMPLE_RATE = 24000