fix(lint): resolve ruff formatting issues

- Sort imports alphabetically
- Fix line length violation in _attach_child_switcher
- Add noqa: E402 for late imports (necessary to avoid circular imports)
- All ruff checks now passing

Author: genro

src/smartswitch/__init__.py

@@ -8,8 +8,8 @@
 - DbOpPlugin
 """
 
-from .core import Switcher, BasePlugin, MethodEntry
-from .plugins import SmartAsyncPlugin, DbOpPlugin, LoggingPlugin
+from .core import BasePlugin, MethodEntry, Switcher
+from .plugins import DbOpPlugin, LoggingPlugin, SmartAsyncPlugin
 
 # PydanticPlugin is conditionally imported in plugins/__init__.py
 # Only available if pydantic is installed

src/smartswitch/core.py

@@ -22,8 +22,7 @@
 
 import contextvars
 from dataclasses import dataclass, field
-from typing import Any, Callable, Dict, Iterator, List, Optional, Set, Type, Tuple
-
+from typing import Any, Callable, Dict, Iterator, List, Optional, Set, Tuple, Type
 
 # ============================================================
 # THREAD-LOCAL CONTEXT
@@ -297,7 +296,9 @@ def get_child(self, name: str) -> "Switcher":
         except KeyError:
             raise KeyError(f"No child switch named {name!r} in {self!r}")
 
-    def _attach_child_switcher(self, child: "Switcher", explicit_name: Optional[str] = None) -> None:
+    def _attach_child_switcher(
+        self, child: "Switcher", explicit_name: Optional[str] = None
+    ) -> None:
         """Attach an actual Switcher instance as a child."""
         if child is self:
             raise ValueError("Cannot attach a switch to itself")

src/smartswitch/plugins/__init__.py

@@ -5,7 +5,7 @@
 import inspect
 from typing import Optional
 
-from ..core import MethodEntry, BasePlugin, Switcher
+from ..core import BasePlugin, MethodEntry, Switcher
 
 
 class SmartAsyncPlugin(BasePlugin):
@@ -76,11 +76,11 @@ def wrapper(*args, **kwargs):
 Switcher.register_plugin("dbop", DbOpPlugin)
 
 # Import logging plugin (always available)
-from .logging import LoggingPlugin
+from .logging import LoggingPlugin  # noqa: E402
 
 # Import pydantic plugin only if pydantic is installed
 try:
-    from .pydantic import PydanticPlugin
+    from .pydantic import PydanticPlugin  # noqa: E402
     __all__ = ["SmartAsyncPlugin", "DbOpPlugin", "LoggingPlugin", "PydanticPlugin"]
 except ImportError:
     # Pydantic not installed - plugin not available

src/smartswitch/plugins/logging.py

@@ -10,7 +10,7 @@
 from typing import TYPE_CHECKING, Any, Callable, Optional
 
 if TYPE_CHECKING:
-    from ..core import Switcher, MethodEntry
+    from ..core import MethodEntry, Switcher
 
 from ..core import BasePlugin
 
@@ -379,5 +379,6 @@ def set_mode(self, mode: str):
 
 
 # Register plugin globally
-from ..core import Switcher
+from ..core import Switcher  # noqa: E402
+
 Switcher.register_plugin("logging", LoggingPlugin)

src/smartswitch/plugins/pydantic.py

@@ -22,7 +22,7 @@
     )
 
 if TYPE_CHECKING:
-    from ..core import Switcher, MethodEntry
+    from ..core import MethodEntry, Switcher
 
 from ..core import BasePlugin
 
@@ -149,7 +149,7 @@ def wrapper(*args, **kwargs):
             try:
                 bound = sig.bind(*args, **kwargs)
                 bound.apply_defaults()
-            except TypeError as e:
+            except TypeError:
                 # Signature binding failed - let it propagate
                 raise
 
@@ -187,5 +187,6 @@ def wrapper(*args, **kwargs):
 
 
 # Register plugin globally
-from ..core import Switcher
+from ..core import Switcher  # noqa: E402
+
 Switcher.register_plugin("pydantic", PydanticPlugin)