Use ctx instead of db.DefaultContext in some packages(routers/services/modules) (#19163)

* Remove `db.DefaultContext` usage in routers, use `ctx` directly

* Use `ctx` directly if there is one, remove some `db.DefaultContext` in `services`

* Use ctx instead of db.DefaultContext for `cmd` and some `modules` packages

* fix incorrect context usage

services/repository/push.go

@@ -95,7 +95,7 @@ func pushUpdates(optsList []*repo_module.PushUpdateOptions) error {
 	}
 	defer gitRepo.Close()
 
-	if err = models.UpdateRepoSize(db.DefaultContext, repo); err != nil {
+	if err = models.UpdateRepoSize(ctx, repo); err != nil {
 		log.Error("Failed to update size for repository: %v", err)
 	}