feat(env): add tag support for environment variables and task injection

- Add generic DataRelation and DataStorage models for tags
- Update EnvService and EnvController to support tag assignment, querying, and filtering
- Integrate EnvTagsConfig in Env settings for managing environment tags
- Enhance TaskDialog environment selection to support searching and displaying env tags
- Fix missing TaskLangConfig import in RepoDialog

internal/router/api_routes.go

@@ -102,6 +102,7 @@ func registerEnvRoutes(g *gin.RouterGroup, c *Controllers) {
 	env := g.Group("/env")
 	{
 		env.GET("/secret-status", c.Env.GetSecretStatus)
+		env.GET("/tags", c.Env.GetTags)
 		env.POST("", c.Env.CreateEnvVar)
 		env.GET("", c.Env.GetEnvVars)
 		env.GET("/all", c.Env.GetAllEnvVars)