refactor: 调整项目结构为单向依赖

backend/go.mod

@@ -22,12 +22,14 @@ require (
 	golang.org/x/net v0.47.0
 	golang.org/x/term v0.37.0
 	gopkg.in/yaml.v3 v3.0.1
+	gorm.io/datatypes v1.2.0
 	gorm.io/driver/postgres v1.5.4
 	gorm.io/gorm v1.25.5
 )
 
 require (
 	dario.cat/mergo v1.0.2 // indirect
+	filippo.io/edwards25519 v1.1.0 // indirect
 	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
 	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/andybalholm/brotli v1.2.0 // indirect
@@ -57,6 +59,7 @@ require (
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-playground/validator/v10 v10.14.0 // indirect
+	github.com/go-sql-driver/mysql v1.8.1 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/subcommands v1.2.0 // indirect
@@ -64,8 +67,8 @@ require (
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/icholy/digest v1.1.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
-	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
-	github.com/jackc/pgx/v5 v5.5.4 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20231201235250-de7065d80cb9 // indirect
+	github.com/jackc/pgx/v5 v5.5.5 // indirect
 	github.com/jackc/puddle/v2 v2.2.1 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
@@ -132,4 +135,5 @@ require (
 	google.golang.org/grpc v1.75.1 // indirect
 	google.golang.org/protobuf v1.36.10 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
+	gorm.io/driver/mysql v1.5.2 // indirect
 )