Django updates

#34904: Changing email object after sending mutates mail in mail.outbox -----------------------------

#36499: strip_tags() and test_parsing_errors() fails with patched Python versions due to HTMLParser

#34211: Performance regression in ForeignKeyDeferredAttribute changes. ------------------------------

#31834: Cannot sqlmigrate on Django migrations that change unique_together --------------------------

#36847: FileField(upload_to=...) callback no longer sees `auto_now_add ` field ----------------------

#36608: Clarify dumpdata behavior and docs for custom serializers with internal_use_only flag -------

#36533: manage.py startapp <name> <directory> fails to create new app -------------------

#36233: Specific DecimalField with integer part longer than 15 digits can be stored but not retrieved

#36877: Order of update operations behaves differently on MySQL compared to other databases ---------

#36872: Django's template engine cannot handle asynchronous methods -----------------------------

#36876: Model timestamp fields get different values using auto_now ----------------------------------

#36875: Avoid unnecessary Coalesce in Concat/ConcatPair -------------------------------------+-------

#13883: Render named groups of field choices in the admin with optgroups ----------------------------

#35875: Dark mode support for django/views/templates/*.html -------------------------------------+---

#36850: Django Admin filter sidebar wraps if its inner content becomes too large --------------------

#23076: Cascaded deletion of polymorphic models fails -------------------------------------+---------

#36863: Under WSGI, multiple calls to asgiref.sync.async_to_sync within the same request do not share

#32213: QuerySet.values()/.values_list() on KeyTransforms return wrong values for double-quoted

#36874: Speed up mask/unmask cipher secret functions -------------------------------------+----------

#36873: Improve visual aspects of related-widget-wrapper icons. -------------------------------------

#33952: Too aggressive pk control in create_reverse_many_to_one_manager -----------------------------

#19580: Unify reverse foreign key and m2m unsaved model querying ------------------------------------

#13883: Render named groups of field choices in the admin with optgroups ----------------------------

#36382: Confirm support for GDAL 3.11 -----------------------------+---------------------------------

#36857: Add totally_ordered property to QuerySet to check for deterministic ordering ----------------

#36030: SQLite backend: division with Decimal("x.0") operand discards fractional portion of

#36639: Add CI step to run makemigrations --check against test models -------------------------------

#10554: Response.set_cookie should allow setting two cookies of the same name. ----------------------

#36509: Missing label on input fields in tables -------------------------------------+---------------

#36788: horizontal alignment of fields in admin change not working in 6.0 ---------------------------