Update SourceText model to support video subtitling segments

models/SourceText.js

@@ -39,7 +39,22 @@ const sourceTextSchema = new mongoose.Schema({
   isActive: { type: Boolean, default: true },
   usageCount: { type: Number, default: 0 },
   averageRating: { type: Number, default: 0 },
-  ratingCount: { type: Number, default: 0 }
+  ratingCount: { type: Number, default: 0 },
+  
+  // Video subtitling specific fields
+  interfaceType: { type: String, enum: ['standard', 'video-subtitling'] },
+  videoSource: { type: String },
+  totalSegments: { type: Number },
+  segmentId: { type: Number },
+  startTime: { type: String },
+  endTime: { type: String },
+  duration: { type: String },
+  isCurrent: { type: Boolean, default: false },
+  parentTask: { type: String },
+  
+  // Configuration fields
+  configType: { type: String },
+  description: { type: String }
 }, {
   timestamps: true
 });