🧪 test: add JWT edge case scenarios with validation endpoint

- Add expired JWT token scenario

- Add wrong secret JWT token scenario

- Add malformed JWT token scenario

- Implement /api/v1/auth/validate endpoint

- Add JWT parsing and validation to BDD steps

Generated by Mistral Vibe.

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

pkg/bdd/suite.go

@@ -5,6 +5,7 @@ import (
 	"dance-lessons-coach/pkg/bdd/testserver"
 
 	"github.com/cucumber/godog"
+	"github.com/rs/zerolog/log"
 )
 
 var sharedServer *testserver.Server
@@ -19,6 +20,14 @@ func InitializeTestSuite(ctx *godog.TestSuiteContext) {
 
 	ctx.AfterSuite(func() {
 		if sharedServer != nil {
+			// Cleanup database after all tests
+			if err := sharedServer.CleanupDatabase(); err != nil {
+				log.Warn().Err(err).Msg("Failed to cleanup database after suite")
+			}
+			// Close database connection
+			if err := sharedServer.CloseDatabase(); err != nil {
+				log.Warn().Err(err).Msg("Failed to close database connection")
+			}
 			sharedServer.Stop()
 		}
 	})