fix: services/__init__.py with proper exports for clean imports

backend/app/services/__init__.py

@@ -1 +1,27 @@
-# Services
+"""
+TestGenius AI — Services Package
+=================================
+Core services for test generation, analysis, and LLM interaction.
+"""
+
+from app.services.llm_provider import generate_with_llm, get_provider_info, get_usage_stats
+from app.services.novelty_features import (
+    analyze_code_complexity,
+    detect_coverage_gaps,
+    score_test_quality,
+    suggest_mutations,
+    execute_mutations,
+    scan_api_security,
+)
+
+__all__ = [
+    "generate_with_llm",
+    "get_provider_info",
+    "get_usage_stats",
+    "analyze_code_complexity",
+    "detect_coverage_gaps",
+    "score_test_quality",
+    "suggest_mutations",
+    "execute_mutations",
+    "scan_api_security",
+]