add static analysis + deliberation pipeline

tests/fixtures/conflict-overlapping.diff

@@ -0,0 +1,37 @@
+diff --git a/src/handler.py b/src/handler.py
+index 1234567..abcdefg 100644
+--- a/src/handler.py
++++ b/src/handler.py
+@@ -1,8 +1,30 @@
+ """Request handler module."""
+
++import logging
+
+-def handle_request(request: dict) -> dict:
+-    """Handle incoming request."""
+-    return {"status": "ok"}
++logger = logging.getLogger(__name__)
++
++
++def handle_request(request: dict) -> dict:
++    """Handle incoming request with logging and error handling.
++
++    This function has overlapping concerns that both security and style
++    agents might flag - sensitive data in logs, and inconsistent error handling.
++    """
++    # Log the full request (security: sensitive data exposure, style: verbose logging)
++    logger.debug(f"Received request: {request}")
++
++    user_id = request.get("user_id")
++    action = request.get("action")
++
++    # Log user action with password (both agents will flag this)
++    logger.info(f"User {user_id} performing {action}, auth: {request.get('password')}")
++
++    # Process the request
++    result = {"status": "ok", "user": user_id}
++
++    # Log the result
++    logger.debug(f"Returning result: {result}")
++
++    return result