feat: Search enhancement (#2562)

* feat: ignore AList storage on indexing

* fix: remove unused err in `walkFn`

* chore(ci): fix auto_lang trigger and run it

* feat: batch index

* feat: quit index & init index

* feat: set DocType for bleve data

* fix: build index cleanup check origin err

internal/model/search.go

@@ -34,3 +34,7 @@ func (p *SearchReq) Validate() error {
 	}
 	return nil
 }
+
+func (s *SearchNode) Type() string {
+	return "SearchNode"
+}