Add ASR interim results support in Assistant model and API

- Introduced `asr_interim_enabled` field in the Assistant model to control interim ASR results.
- Updated AssistantBase and AssistantUpdate schemas to include the new field.
- Modified the database schema to add the `asr_interim_enabled` column.
- Enhanced runtime metadata to reflect interim ASR settings.
- Updated API endpoints and tests to validate the new functionality.
- Adjusted documentation to include details about interim ASR results configuration.

api/app/models.py

@@ -127,6 +127,7 @@ class Assistant(Base):
     speed: Mapped[float] = mapped_column(Float, default=1.0)
     hotwords: Mapped[dict] = mapped_column(JSON, default=list)
     tools: Mapped[dict] = mapped_column(JSON, default=list)
+    asr_interim_enabled: Mapped[bool] = mapped_column(default=False)
     bot_cannot_be_interrupted: Mapped[bool] = mapped_column(default=False)
     interruption_sensitivity: Mapped[int] = mapped_column(Integer, default=500)
     config_mode: Mapped[str] = mapped_column(String(32), default="platform")