Cycle 12: lift 'import math' to module level (sync + aio)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: antoineleclair

src/dqlitedbapi/aio/connection.py

@@ -2,6 +2,7 @@
 
 import asyncio
 import contextlib
+import math
 from typing import Any
 
 from dqliteclient import DqliteConnection
@@ -30,8 +31,6 @@ def __init__(
                 frames. Forwarded to the underlying DqliteConnection;
                 ``None`` disables the cap.
         """
-        import math
-
         if not math.isfinite(timeout) or timeout <= 0:
             raise ValueError(f"timeout must be a positive finite number, got {timeout}")
         self._address = address

src/dqlitedbapi/connection.py

@@ -2,6 +2,7 @@
 
 import asyncio
 import contextlib
+import math
 import threading
 import warnings
 import weakref
@@ -75,8 +76,6 @@ def __init__(
                 frames for a single query. Forwarded to the underlying
                 :class:`DqliteConnection`. ``None`` disables the cap.
         """
-        import math
-
         if not math.isfinite(timeout) or timeout <= 0:
             raise ValueError(f"timeout must be a positive finite number, got {timeout}")
         self._address = address