Splitgraph

* Fix `libffi` crashes when using the Snowflake FDW (https://github.com/splitgraph/sgr/pull/623)

* Support for aggregation and GROUP BY pushdown for the Snowflake FDW
* https://github.com/splitgraph/sgr/pull/620
* https://github.com/splitgraph/Multicorn/pull/3
* Fix FDW previews when column names have percentage signs (https://github.com/splitgraph/sgr/pull/619)

* Further support for aggregation pushdown with Multicorn-backed FDWs
* https://github.com/splitgraph/Multicorn/pull/2
* https://github.com/splitgraph/sgr/pull/613
* https://github.com/splitgraph/postgres-elasticsearch-fdw/pull/2
* Speed up `sgr commit` chunking by about 1.5x-10x (https://github.com/splitgraph/sgr/pull/611)
* Various fixes to `sgr cloud seed` (https://github.com/splitgraph/sgr/pull/606)

* Minor fixes to `sgr cloud seed` (https://github.com/splitgraph/sgr/pull/604)
* Add a flag to restore old `sgr csv import` behaviour (https://github.com/splitgraph/sgr/pull/605)

* Fix various issues with the dbt project and GitHub Actions that `sgr cloud seed` generates (https://github.com/splitgraph/sgr/pull/602, https://github.com/splitgraph/sgr/pull/591)
* Initial support for aggregation pushdown with Multicorn-backed FDWs (currently implemented in our fork of postgres-elasticsearch-fdw)
* https://github.com/splitgraph/sgr/pull/581
* https://github.com/splitgraph/Multicorn/pull/1
* https://github.com/splitgraph/postgres-elasticsearch-fdw/pull/1

Fix `sgr cloud sync` invocation issue (https://github.com/splitgraph/sgr/pull/589)