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.

web/types.ts

@@ -19,6 +19,7 @@ export interface Assistant {
   speed: number;
   hotwords: string[];
   tools?: string[]; // IDs of enabled tools
+  asrInterimEnabled?: boolean;
   botCannotBeInterrupted?: boolean;
   interruptionSensitivity?: number; // In ms
   configMode?: 'platform' | 'dify' | 'fastgpt' | 'none';