🧪 test: implement comprehensive BDD test suite for JWT secret rotation

- Added JWT secret rotation feature tests
- Implemented config management BDD steps
- Created greet service BDD scenarios
- Enhanced test server with JWT rotation support
- Added comprehensive step definitions

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

pkg/bdd/steps/steps.go

@@ -4,6 +4,7 @@ import (
 	"dance-lessons-coach/pkg/bdd/testserver"
 
 	"github.com/cucumber/godog"
+	"github.com/rs/zerolog/log"
 )
 
 // StepContext holds the test client and implements all step definitions
@@ -30,6 +31,16 @@ func NewStepContext(client *testserver.Client) *StepContext {
 	}
 }
 
+// CleanupAllTestConfigFiles cleans up any test config files created during tests
+func CleanupAllTestConfigFiles() error {
+	// Cleanup config hot reloading test file
+	configSteps := &ConfigSteps{configFilePath: "test-config.yaml"}
+	if err := configSteps.CleanupTestConfigFile(); err != nil {
+		log.Warn().Err(err).Msg("Failed to cleanup config test file")
+	}
+	return nil
+}
+
 // InitializeAllSteps registers all step definitions for the BDD tests
 func InitializeAllSteps(ctx *godog.ScenarioContext, client *testserver.Client) {
 	sc := NewStepContext(client)