fix: ruff unused imports, catch concurrent.futures.TimeoutError explicitly

Author: Patel230

src/hawk/workflow.py

@@ -113,7 +113,7 @@ def _run_step_with_timeout(self, s: Step, input_val: Any) -> Any:
             future = pool.submit(self._run_step_sync, s, input_val)
             try:
                 return future.result(timeout=s.timeout)
-            except TimeoutError:
+            except concurrent.futures.TimeoutError:
                 raise TimeoutError(
                     f"Step '{s.name}' timed out after {s.timeout}s"
                 ) from None

tests/test_evaluate.py

@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-from dataclasses import dataclass
 from unittest.mock import AsyncMock, MagicMock
 
 import pytest

tests/test_memory_tools.py

@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-import json
 from unittest.mock import MagicMock
 
 from hawk.memory_tools import MemoryTools

tests/test_tracing.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
 
 import hawk.tracing as tracing
 from hawk.tracing import (
@@ -182,7 +182,6 @@ class TestTraceChatAsyncDecorator:
     """Tests for @trace_chat on async functions."""
 
     async def test_async_passthrough_when_disabled(self) -> None:
-        import asyncio
 
         tracing._tracing_enabled = False
 
@@ -194,7 +193,6 @@ async def my_chat(message: str) -> str:
         assert result == "Async: hello"
 
     async def test_async_preserves_name(self) -> None:
-        import asyncio
 
         tracing._tracing_enabled = False
 
@@ -209,7 +207,6 @@ class TestTraceToolAsyncDecorator:
     """Tests for @trace_tool on async functions."""
 
     async def test_async_passthrough_when_disabled(self) -> None:
-        import asyncio
 
         tracing._tracing_enabled = False
 
@@ -221,7 +218,6 @@ async def my_tool(query: str) -> str:
         assert result == "Result: search"
 
     async def test_async_exception_propagates(self) -> None:
-        import asyncio
 
         import pytest