feat: Implement ZIP RAG import functionality with background processing

- Added support for ZIP RAG import in the asset management system.
- Introduced a new background task type for ZIP RAG imports.
- Enhanced the asset import process to allow for optional development processing.
- Updated the UI to reflect the new RAG processing status and options.
- Created database migration for background tasks related to ZIP RAG imports.
- Refactored asset handling to support FLV normalization and improved error handling.
- Added new API endpoints and updated existing ones to accommodate changes.

web/studio/src/lib/api.ts

@@ -755,6 +755,8 @@ export interface AssetZipImportResult {
     rag_ingested_assets: number;
     rag_chunks_ingested: number;
     failed_entries: string[];
+    rag_background_started?: boolean;
+    rag_background_items?: number;
 }
 
 export interface Cohort {
@@ -1130,6 +1132,7 @@ export const cmsApi = {
         splitToRegular = false,
         samCourseIdR1?: number,
         samCourseIdR2?: number,
+        useDevProcessing = false,
     ): Promise<AssetZipImportResult> => {
         return new Promise((resolve, reject) => {
             const maxNetworkRetries = 2;
@@ -1147,6 +1150,9 @@ export const cmsApi = {
                     if (samCourseIdR1) formData.append('sam_course_id_r1', String(samCourseIdR1));
                     if (samCourseIdR2) formData.append('sam_course_id_r2', String(samCourseIdR2));
                 }
+                if (useDevProcessing) {
+                    formData.append('use_dev_processing', 'true');
+                }
 
                 const xhr = new XMLHttpRequest();
                 xhr.open('POST', `${API_BASE_URL}/api/assets/import-zip`);
@@ -1819,7 +1825,7 @@ export interface BackgroundTask {
     id: string;
     title: string;
     course_title?: string;
-    task_type: 'lesson_transcription' | 'lesson_image' | 'course_image';
+    task_type: 'lesson_transcription' | 'lesson_image' | 'course_image' | 'zip_rag_import';
     status: 'idle' | 'queued' | 'processing' | 'failed' | 'completed' | 'error';
     progress: number;
     updated_at: string;