Add hasThumbnails field to file schema

- Introduced a new optional field `hasThumbnails` in the file schema to indicate the presence of thumbnail images.
- Set the default value of `hasThumbnails` to false for improved data management.

src/database/schemas/management/file.schema.js

@@ -9,6 +9,7 @@ const fileSchema = new mongoose.Schema(
     extension: { required: true, type: String },
     size: { required: false, type: Number },
     metaData: { required: false, type: Object },
+    hasThumbnails: { required: false, type: Boolean, default: false },
   },
   { timestamps: true }
 );