* pool: fix panic when using callbacks
add regression test
* pool: fix panic when using callbacks
add regression test
added missing typedef `MssqlPoolOptions`
* Fixed leak of `Arc<SharedPool>` in `DecrementSizeGuard::cancel()`
* Renamed `PoolOptions::connect_timeout` to `acquire_timeout` for clarity.
* Fixed `/* SQLx ping */` showing up in Postgres query logs
* Made `.close()` a regular function that returns a `Future`
* Deleted deprecated method `PoolConnection::release()`
* Document why connection might be dropped if `Pool::acquire()` is cancelled
* Added connection metadata to pool lifecycle callbacks
* Improved guarantees for `min_connections`
* Fixed `num_idle()` to not spin forever at high load
* Improved documentation across the `pool` module
* query_as: don't stop stream after decoding error
Fixes https://github.com/launchbadge/sqlx/issues/1884
When a single row cannot be converted to the target type of query_as,
it should not prevent the library user from accessing the other rows
Otherwise, the user cannot access all query results in query_as.
* use union in tests to maximize db compatibility
* Make it possible to use both nullability and type overrides
* Fix override parsing lookahead logic
* Update column override tests
* Support nullability overrides with wildcard type overrides
* Fix tests
* Update query! overrides docs
* Remove last bits of macro_result!
* rustfmt
