🎯 refactor: implement comprehensive BDD test suite with modular architecture

✨ feat: add feature-based test organization per ADR 0024
🐛 fix: resolve compilation errors in suite_feature.go
📝 docs: add comprehensive BDD framework documentation
♻️ refactor: split monolithic tests into modular features
🧪 test: implement synchronization helpers and context management
⚡ perf: add parallel test execution capability
🔧 chore: add feature-specific test scripts and validation
📚 docs: move BDD_TAGS.md to features/ for better organization

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

features/greet/greet.feature

@@ -0,0 +1,37 @@
+# features/greet.feature
+@greet @smoke
+Feature: Greet Service
+  The greet service should return appropriate greetings
+
+  @basic
+  Scenario: Default greeting
+    Given the server is running
+    When I request the default greeting
+    Then the response should be "{\"message\":\"Hello world!\"}"
+
+  @basic
+  Scenario: Personalized greeting
+    Given the server is running
+    When I request a greeting for "John"
+    Then the response should be "{\"message\":\"Hello John!\"}"
+
+  @v2 @api
+  Scenario: v2 greeting with JSON POST request
+    Given the server is running with v2 enabled
+    When I send a POST request to v2 greet with name "John"
+    Then the response should be "{\"message\":\"Hello my friend John!\"}"
+
+  Scenario: v2 default greeting with empty name
+    Given the server is running with v2 enabled
+    When I send a POST request to v2 greet with name ""
+    Then the response should be "{\"message\":\"Hello my friend!\"}"
+
+  Scenario: v2 greeting with missing name field
+    Given the server is running with v2 enabled
+    When I send a POST request to v2 greet with invalid JSON "{}"
+    Then the response should be "{\"message\":\"Hello my friend!\"}"
+
+  Scenario: v2 greeting with name that is too long
+    Given the server is running with v2 enabled
+    When I send a POST request to v2 greet with name "ThisNameIsWayTooLongAndShouldFailValidationBecauseItExceedsTheMaximumAllowedLengthOf100Characters!!!!"
+    Then the response should contain error "validation_failed"

features/greet/greet_test.go

@@ -0,0 +1,29 @@
+package greet
+
+import (
+	"os"
+	"testing"
+
+	"dance-lessons-coach/pkg/bdd"
+	"github.com/cucumber/godog"
+)
+
+func TestGreetBDD(t *testing.T) {
+	// Set FEATURE environment variable for feature-specific configuration
+	os.Setenv("FEATURE", "greet")
+
+	suite := godog.TestSuite{
+		Name:                 "dance-lessons-coach BDD Tests - Greet Feature",
+		TestSuiteInitializer: bdd.InitializeTestSuite,
+		ScenarioInitializer:  bdd.InitializeScenario,
+		Options: &godog.Options{
+			Format:   "progress",
+			Paths:    []string{"."},
+			TestingT: t,
+		},
+	}
+
+	if suite.Run() != 0 {
+		t.Fatal("non-zero status returned, failed to run greet BDD tests")
+	}
+}