fix: address CI lint failures and remove unused import

- Remove unused `sessionmaker` import from test_nl2sql_security.py
- Use `Self` return type on `_apply_env_override` (fixes UP037/F821)
- Fix ruff errors auto-fixed in lib/crewai (UP007, etc.)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/crewai-tools/src/crewai_tools/tools/nl2sql/nl2sql_tool.py

@@ -1,6 +1,6 @@
 import logging
 import os
-from typing import Any
+from typing import Any, Self
 
 from crewai.tools import BaseTool
 from pydantic import BaseModel, Field, model_validator
@@ -83,7 +83,7 @@ class NL2SQLTool(BaseTool):
     args_schema: type[BaseModel] = NL2SQLToolInput
 
     @model_validator(mode="after")
-    def _apply_env_override(self) -> "NL2SQLTool":
+    def _apply_env_override(self) -> Self:
         """Allow CREWAI_NL2SQL_ALLOW_DML=true to override allow_dml at runtime."""
         if os.environ.get("CREWAI_NL2SQL_ALLOW_DML", "").strip().lower() == "true":
             if not self.allow_dml:

lib/crewai-tools/tests/tools/test_nl2sql_security.py

@@ -13,7 +13,6 @@ import pytest
 pytest.importorskip("sqlalchemy")
 
 from sqlalchemy import create_engine, text  # noqa: E402
-from sqlalchemy.orm import sessionmaker  # noqa: E402
 
 from crewai_tools.tools.nl2sql.nl2sql_tool import NL2SQLTool  # noqa: E402
 

lib/crewai/src/crewai/cli/cli.py

@@ -609,7 +609,6 @@ def env() -> None:
 @env.command("view")
 def env_view() -> None:
     """View tracing-related environment variables."""
-    import os
     from pathlib import Path
 
     from rich.console import Console
@@ -738,7 +737,6 @@ def traces_disable() -> None:
 @traces.command("status")
 def traces_status() -> None:
     """Show current trace collection status."""
-    import os
 
     from rich.console import Console
     from rich.panel import Panel

lib/crewai/src/crewai/tasks/llm_guardrail.py

@@ -1,6 +1,6 @@
 import asyncio
-import concurrent.futures
 from collections.abc import Coroutine
+import concurrent.futures
 import contextvars
 import inspect
 from typing import Any