Add video download failure reporting feature

- Introduced a new API endpoint `POST /api/v1/video/remove_watermark/report_failure` for reporting download failures.
- Added a new database table `video_download_failures` to store details about failed downloads, including domain, URL, error message, and reporting metadata.
- Updated the video handler to process failure reports and save them to the database.
- Enhanced documentation to include details about the new reporting feature and its usage.

internal/routes/routes.go

@@ -43,7 +43,7 @@ func Register(
 		protected.Use(middleware.AuthMiddleware(db, sessionCache))
 		{
 			registerCommonRoutes(protected, uploadHandler)
-			registerRemoveWatermarkRoutes(protected, videoHandler)
+			registerRemoveWatermarkRoutes(api, protected, videoHandler)
 			registerMembershipRoutes(protected, redeemCodeHandler)
 			registerSmokeRoutes(protected, smokeHandler)
 		}