fix(imports): remove duplicate get_python_files and unused scan_repository in bug_detection_agent

app/agents/bug_detection_agent.py

@@ -1,11 +1,10 @@
 from app.core.logger import get_logger
 from app.tools.static_analyzer import run_full_analysis
 from app.tools.pytest_runner import run_tests
-from app.tools.file_scanner import get_python_files
+from app.tools.file_scanner import get_python_files, sanitize_for_prompt
 from app.core.llm import call_llm_for_json
 from app.core.prompts import BUG_DETECTION_PROMPT
 from app.models.issue import IssueReport, Bug, Warning, Suggestion
-from app.tools.file_scanner import scan_repository, get_python_files, sanitize_for_prompt
 
 
 logger = get_logger(__name__)