✨ feat: implement user authentication system with JWT and PostgreSQL

Added comprehensive user management system:
- User registration with validation (3-50 char username, 6+ char password)
- JWT-based authentication with bcrypt password hashing
- Admin authentication with master password
- Password reset workflow with admin flagging
- PostgreSQL repository implementation
- SQLite repository for testing
- Unified authentication service interface

API Endpoints:
- POST /api/v1/auth/register - User registration
- POST /api/v1/auth/login - User/admin authentication
- POST /api/v1/auth/password-reset/request - Request password reset
- POST /api/v1/auth/password-reset/complete - Complete password reset
- POST /api/v1/auth/validate - JWT token validation

Security Features:
- Password hashing with bcrypt
- JWT token generation and validation
- Admin claims in JWT tokens
- Configurable token expiration
- Input validation for all endpoints

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

go.mod

@@ -8,9 +8,12 @@ require (
 	github.com/go-playground/locales v0.14.1
 	github.com/go-playground/universal-translator v0.18.1
 	github.com/go-playground/validator/v10 v10.30.2
+	github.com/golang-jwt/jwt/v5 v5.3.1
+	github.com/lib/pq v1.12.3
 	github.com/rs/zerolog v1.35.0
 	github.com/spf13/cobra v1.8.0
 	github.com/spf13/viper v1.21.0
+	github.com/stretchr/testify v1.11.1
 	github.com/swaggo/http-swagger v1.3.4
 	github.com/swaggo/swag v1.16.6
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.67.0
@@ -18,6 +21,10 @@ require (
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.43.0
 	go.opentelemetry.io/otel/sdk v1.43.0
 	go.opentelemetry.io/otel/trace v1.43.0
+	golang.org/x/crypto v0.49.0
+	gorm.io/driver/postgres v1.6.0
+	gorm.io/driver/sqlite v1.6.0
+	gorm.io/gorm v1.31.1
 )
 
 require (
@@ -26,6 +33,7 @@ require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cucumber/gherkin/go/v26 v26.2.0 // indirect
 	github.com/cucumber/messages/go/v21 v21.0.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.13 // indirect
@@ -43,12 +51,20 @@ require (
 	github.com/hashicorp/go-memdb v1.3.5 // indirect
 	github.com/hashicorp/golang-lru v1.0.2 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // 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
+	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/leodido/go-urn v1.4.0 // indirect
 	github.com/mailru/easyjson v0.7.6 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-sqlite3 v1.14.22 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/sagikazarmark/locafero v0.11.0 // indirect
 	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
 	github.com/spf13/afero v1.15.0 // indirect
@@ -61,7 +77,6 @@ require (
 	go.opentelemetry.io/otel/metric v1.43.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.10.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/crypto v0.49.0 // indirect
 	golang.org/x/mod v0.33.0 // indirect
 	golang.org/x/net v0.52.0 // indirect
 	golang.org/x/sync v0.20.0 // indirect
@@ -73,4 +88,5 @@ require (
 	google.golang.org/grpc v1.80.0 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )