refactor: migrate from raw pgx to GORM, unify ErrNoRows, cleanup auth

go.mod

@@ -6,13 +6,14 @@ require (
 	github.com/gin-gonic/gin v1.12.0
 	github.com/golang-jwt/jwt/v5 v5.3.1
 	github.com/google/uuid v1.6.0
-	github.com/jackc/pgx/v5 v5.7.4
 	github.com/joho/godotenv v1.5.1
 	github.com/pressly/goose/v3 v3.24.2
 	github.com/swaggo/files v1.0.1
 	github.com/swaggo/gin-swagger v1.6.1
 	github.com/swaggo/swag v1.16.6
 	golang.org/x/crypto v0.53.0
+	gorm.io/driver/postgres v1.6.0
+	gorm.io/gorm v1.31.1
 )
 
 require (
@@ -36,7 +37,10 @@ require (
 	github.com/goccy/go-yaml v1.19.2 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.7.4 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect