feat: implement storage quota management for uploads

- Added storage quota enforcement for audio and image uploads in the respective routes.
- Introduced reservation system to manage concurrent uploads and prevent quota overages.
- Enhanced comment creation to account for audio and image attachment sizes against user quotas.
- Created new UploadReservation model to track in-flight upload reservations.
- Backfilled existing video assets with size information from R2.
- Added progress component for UI feedback during uploads.
- Updated API responses to include reservation IDs for better quota management.
- Adjusted error handling to return appropriate storage limit exceeded messages.

app/api/comments/[commentId]/route.ts

@@ -189,6 +189,9 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
             if (annotationData === null) {
                 updateData.annotationData = null;
             } else {
+                if (!Array.isArray(annotationData)) {
+                    return apiErrors.badRequest('annotationData must be an array of valid stroke objects');
+                }
                 const validStrokes = validateAnnotationStrokes(annotationData);
                 if (validStrokes === null) {
                     return apiErrors.badRequest('annotationData must be an array of valid stroke objects');