Change-Id: I625af65b3fb1815b1af17dc2ef47dd697fdc3fb1

because we are forced by pep-681 to use the argument
"default", we need a way to have client Column default
separate from a dataclasses level default.  Also, pep-681
does not support deriving the descriptor function from
Annotated, so allow a brief right side mapped_column() to
be present that will have more column-centric arguments
from the left side Annotated to be merged.

Change-Id: I039be1628d498486ba013b2798e1392ed1cd7f9f

Rearchitected the schema reflection API to allow some dialects to make use
of high performing batch queries to reflect the schemas of many tables at
once using much fewer queries. The new performance features are targeted
first at the PostgreSQL and Oracle backends, and may be applied to any
dialect that makes use of SELECT queries against system catalog tables to
reflect tables (currently this omits the MySQL and SQLite dialects which
instead make use of parsing the "CREATE TABLE" statement, however these
dialects do not have a pre-existing performance issue with reflection. MS
SQL Server is still a TODO).

The new API is backwards compatible with the previous system, and should
require no changes to third party dialects to retain compatibility;
third party dialects can also opt into the new system by implementing
batched queries for schema reflection.

Along with this change is an updated reflection API that is fully
:pep:`484` typed, features many new methods and some changes.

Fixes: #4379
Change-Id: I897ec09843543aa7012bcdce758792ed3d415d08

Added new backend-agnostic :class:`_types.Uuid` datatype generalized from
the PostgreSQL dialects to now be a core type, as well as migrated
:class:`_types.UUID` from the PostgreSQL dialect. Thanks to Trevor Gross
for the help on this.

also includes:

* corrects some missing behaviors in the suite literal fixtures
  test where row round trips weren't being correctly asserted.
* fixes some of the ISO literal date rendering added in
  952383f9ee0 for #5052 to truncate datetime strings for date/time
  datatypes in the same way that drivers typically do for bound
  parameters; this was not working fully and wasn't caught by the
  broken test fixture

Fixes: #7212
Change-Id: I981ac6d34d278c18281c144430a528764c241b04

to simplify pyproject.toml change the remaining files
that aren't going to be typed on this first pass
(unless of course someone wants to type some of these)
to include # mypy: ignore-errors.   for the moment, only a handful
of ORM modules are to have more type checking implemented.

It's important that ignore-errors is used and
not "# type: ignore", as in the latter case, mypy doesn't even
read the existing types in the file, which makes it impossible to
type any files that refer to those modules at all.

to simplify ongoing typing work use inline mypy config
for remaining files that are "done" for now, indicating the
level of type checking they currently have.

Change-Id: I98669c1a305c2f0adba85d10b5425541f3fe9533

__future__.annotations mode allows us to use non-string
annotations for argument and return types in most cases,
but more importantly it removes a large amount of runtime
overhead that would be spent in evaluating the annotations.

Change-Id: I2f5b6126fe0019713fc50001be3627b664019ede
References: #6810

Change-Id: I49abf2607e0eb0623650efdf0091b1fb3db737ea

References: #4600
Change-Id: I2a62ddfe00bc562720f0eae700a497495d7a987a

Fixes: #7258
Change-Id: I3577f665eca04f2632b69bcb090f0a4ec9271db9

Also replace http://pypi.python.org/pypi with https://pypi.org/project

Change-Id: I84b5005c39969a82140706472989f2a30b0c7685