feat(config): implement layered configuration using config.yaml and .env

go.mod

@@ -5,10 +5,11 @@ go 1.26
 require (
 	github.com/gin-gonic/gin v1.11.0
 	github.com/golang-jwt/jwt/v5 v5.3.1
+	github.com/google/uuid v1.6.0
+	github.com/joho/godotenv v1.5.1
 	github.com/mattn/go-sqlite3 v1.14.22
 	github.com/spf13/viper v1.21.0
 	github.com/stretchr/testify v1.11.1
-	github.com/subosito/gotenv v1.6.0
 	github.com/yeqown/go-qrcode/v2 v2.2.5
 	github.com/yeqown/go-qrcode/writer/standard v1.3.0
 	go.uber.org/zap v1.27.1
@@ -48,7 +49,6 @@ require (
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
-	github.com/google/uuid v1.6.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/pgx/v5 v5.6.0 // indirect
@@ -67,6 +67,7 @@ require (
 	github.com/spf13/afero v1.15.0 // indirect
 	github.com/spf13/cast v1.10.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.3.0 // indirect
 	go.uber.org/multierr v1.10.0 // indirect