rel_2_0_50

🐛 Bug Fixes

• Fixed issue where using `_orm.joinedload()` with `PropComparator.of_type()` targeting a joined-table subclass combined with `PropComparator.and_()` referencing a column on that subclass would generate invalid SQL.
• Fixed issue where the presence of a `SessionEvents.do_orm_execute()` event hook would cause internal execution options to leak between compilation passes, leading to errors with relationship loaders like `selectinload()` and `immediateload()`. Execution options are now correctly scoped.
• Fixed issue where using `_orm.with_polymorphic()` on a leaf or non-inherited class failed with an `AttributeError` because mapper configuration was not triggered; `AliasedInsp` now triggers configuration via `_post_inspect` hook.
• Fixed issue where floor division (`//`) between a `Float` or `Numeric` numerator and an `Integer` denominator omitted the `FLOOR()` SQL wrapper on dialects where `Dialect.div_is_floordiv` is true.
• Improved handling of two phase transaction identifiers for PostgreSQL when provided by the user by updating the psycopg dialect to use the DBAPI two phase transaction API.
• Fixed issue where the asyncpg dialect could throw an unhandled `InternalClientError`, preventing connections from being marked as invalidated.
• Fixed issue where the `ExcludeConstraint` construct did not correctly forward the `ExcludeConstraint.info` parameter, causing lost user-defined metadata.
• Narrowed the scope of the internal workaround for MySQL bugs [#88718] and [#96365] to only apply to MySQL 8.0.1 through 8.0.13 or systems with `lower_case_table_names=2`, preventing a `KeyError` during foreign key reflection on newer versions.
• Fixed issue in aiomysql and asyncmy dialects where logic detecting the signature of pymysql's `ping()` method (added in [#10492]) was not correctly handled, appearing since pymysql 1.2.0.
• Escaped key and pragma values when utilizing the pysqlcipher dialect in SQLite.