[Pipeline状态机]：完成全双工状态控制骨架，包含事件诊断、取消图和恢复协调测试

src/owner_voice_pet/__init__.py

@@ -4,6 +4,14 @@ from .config import AppConfig
 from .assistant_pipeline import TurnController, VoiceAssistantPipeline
 from .audio_preprocess import NoopAudioPreprocessor, SherpaOnnxDenoiserPreprocessor
 from .events import PipelineEvent, PipelineEventBus
+from .full_duplex_control import (
+    CancellationGraph,
+    CancellationToken,
+    FullDuplexStateMachine,
+    InvalidStateTransition,
+    RecoveryCoordinator,
+    StateTransition,
+)
 from .models import (
     AudioFrame,
     AudioSegment,
@@ -39,6 +47,12 @@ __all__ = [
     "SherpaOnnxDenoiserPreprocessor",
     "PipelineEvent",
     "PipelineEventBus",
+    "CancellationGraph",
+    "CancellationToken",
+    "FullDuplexStateMachine",
+    "InvalidStateTransition",
+    "RecoveryCoordinator",
+    "StateTransition",
     "AudioFrame",
     "AudioSegment",
     "AudioRingBuffer",