fix: replace blocking time.sleep with asyncio.sleep in LLM condition

CHANGELOG.md

@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Fixed
+
+- **Blocking sleep in LLM condition** -- Replaced `time.sleep()` with
+  `await asyncio.sleep()` in `LLMAssisted` retry backoff to avoid
+  freezing the event loop during LLM retries.
+
 ### Added
 
 - **Description-diff alignment** -- `DescriptionDiffAlignmentCondition` uses

src/rules/conditions/llm_assisted.py

@@ -5,6 +5,7 @@
 opt-in and clearly documented as having LLM latency in the evaluation path.
 """
 
+import asyncio
 import logging
 import time
 from typing import Any
@@ -218,7 +219,7 @@ async def evaluate(self, context: Any) -> list[Violation]:
                 )
 
                 if attempt < max_attempts:
-                    time.sleep(wait_time)
+                    await asyncio.sleep(wait_time)
                 else:
                     # All attempts failed - gracefully degrade
                     logger.error("All LLM retry attempts exhausted; skipping alignment check.")