Merge branch 'main' into add-missing-parameters-to-field

diff --cc sqlmodel/main.py
index f72d6045e30b59b25954df688d782ac9219992ea,9a1a676775a7cde7b36a9b475016fa142dd957d2..b3fc8f08dc8060fa4ded03eb6537a138af325cff
--- 1/sqlmodel/main.py
--- 2/sqlmodel/main.py
+++ b/sqlmodel/main.py
@@@ -3,8 -3,6 +3,7 @@@ from __future__ import annotation
  import builtins
  import ipaddress
  import uuid
- import weakref
 +import warnings
  from collections.abc import Callable, Mapping, Sequence, Set
  from dataclasses import dataclass
  from datetime import date, datetime, time, timedelta