Refactor video handling and integrate new services

- Removed legacy video handling code and models to streamline the codebase.
- Updated main.go to include new services for removing watermarks and smoke logging.
- Enhanced route registration to accommodate new handlers for watermark removal and smoke logging.
- Improved database migration to include new models for watermark processing.

internal/routes/remove_watermark_routes.go

@@ -0,0 +1,13 @@
+package routes
+
+import (
+	"github.com/gin-gonic/gin"
+
+	rmhandler "wx_service/internal/remove_watermark/handler"
+)
+
+func registerRemoveWatermarkRoutes(protected *gin.RouterGroup, videoHandler *rmhandler.VideoHandler) {
+	// 去水印相关接口（保持原有路径不变）
+	protected.POST("/video/remove_watermark", videoHandler.RemoveWatermark)
+	protected.POST("/video/remove_watermark/unlock", videoHandler.UnlockQuota)
+}