Bump sqlalchemy from 1.4.26 to 1.4.51

[dependabot]

Bumps sqlalchemy from 1.4.26 to 1.4.51.

Release notes

Sourced from sqlalchemy's releases.

1.4.51

Released: January 2, 2024

orm

• [orm] [bug] Improved a fix first implemented for #3208 released in version 0.9.8, where the registry of classes used internally by declarative could be subject to a race condition in the case where individual mapped classes are being garbage collected at the same time while new mapped classes are being constructed, as can happen in some test suite configurations or dynamic class creation environments. In addition to the weakref check already added, the list of items being iterated is also copied first to avoid "list changed while iterating" errors. Pull request courtesy Yilei Yang.

  References: #10782

asyncio

• [asyncio] [bug] Fixed critical issue in asyncio version of the connection pool where calling _asyncio.AsyncEngine.dispose() would produce a new connection pool that did not fully re-establish the use of asyncio-compatible mutexes, leading to the use of a plain threading.Lock() which would then cause deadlocks in an asyncio context when using concurrency features like asyncio.gather().

  References: #10813

mysql

• [mysql] [bug] Fixed regression introduced by the fix in ticket #10492 when using pool pre-ping with PyMySQL version older than 1.0.

  References: #10650

1.4.50

Released: October 29, 2023

orm

• [orm] [bug] Fixed fundamental issue which prevented some forms of ORM "annotations" from taking place for subqueries which made use of _sql.Select.join() against a relationship target. These annotations are used whenever a subquery is used in special situations such as within

... (truncated)

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[dependabot]

Superseded by #199.