Fixed typing for the :paramref:`_orm.Session.get.with_for_update` parameter
of :meth:`_orm.Session.get` and :meth:`_orm.Session.refresh` (as well as
corresponding methods on :class:`_asyncio.AsyncSession`) to accept boolean
``True`` and all other argument forms accepted by the parameter at runtime.

Fixes: #9762
Change-Id: Ied4d37a269906b3d9be5ab7d31a2fa863360cced

Fixed issue in :class:`_mutable.Mutable` where event registration for ORM
mapped attributes would be called repeatedly for mapped inheritance
subclasses, leading to duplicate events being invoked in inheritance
hierarchies.

Fixes: #9676
Change-Id: I91289141d7a5f5c86a9033596735ed6eba7071b0

Added a new helper mixin :class:`_asyncio.AsyncAttrs` that seeks to improve
the use of lazy-loader and other expired or deferred ORM attributes with
asyncio, providing a simple attribute accessor that provides an ``await``
interface to any ORM attribute, whether or not it needs to emit SQL.

Change-Id: I1427b288dc28319c854372643066c491b9ee8dc0
References: #9731

Fixes: #9705
Change-Id: I705463b9984f207f2268da6ebd80f07b68aa08f0

this is needed due to previous commit f7bfa04bcae1e9baf

Change-Id: I7fa397707a018455a2c96b62704dfd506742b0cd

Removed versionadded and versionchanged for version prior to 1.2 since they
are no longer useful.

Change-Id: I5c53d1188bc5fec3ab4be39ef761650ed8fa6d3e

Added :func:`_sa.create_pool_from_url` and
:func:`_asyncio.create_async_pool_from_url` to create
a :class:`_pool.Pool` instance from an input url passed as string
or :class:`_sa.URL`.

Fixes: #9613
Change-Id: Icd8aa3f2849e6fd1bc5341114f3ef8d216a2c543

Fixed bug in ORM Declarative Dataclasses where the
:func:`_orm.queryable_attribute` and :func:`_orm.column_property`
constructs, which are documented as read-only constructs in the context of
a Declarative mapping, could not be used with a
:class:`_orm.MappedAsDataclass` class without adding ``init=False``, which
in the case of :func:`_orm.queryable_attribute` was not possible as no
``init`` parameter was included. These constructs have been modified from a
dataclass perspective to be assumed to be "read only", setting
``init=False`` by default and no longer including them in the pep-681
constructor. The dataclass parameters for :func:`_orm.column_property`
``init``, ``default``, ``default_factory``, ``kw_only`` are now deprecated;
these fields don't apply to :func:`_orm.column_property` as used in a
Declarative dataclasses configuration where the construct would be
read-only. Also added read-specific parameter
:paramref:`_orm.queryable_attribute.compare` to
:func:`_orm.queryable_attribute`; :paramref:`_orm.queryable_attribute.repr`
was already present.

Added missing :paramref:`_orm.mapped_column.active_history` parameter
to :func:`_orm.mapped_column` construct.

Fixes: #9628
Change-Id: I2ab44d6b763b20410bd1ebb5ac949a6d223f1ce2