* tests: flow sqlness tests
* tests: WIP df func test
* fix: use schema before expand for transform expr
* tests: some basic flow tests
* tests: unit test
* chore: dep use rev not patch
* fix: wired sqlness error?
* refactor: per review
* fix: temp sqlness bug
* fix: use fixed sqlness
* fix: impl drop as async shutdown
* refactor: per bot's review
* tests: drop worker handler both sync/async
* docs: add rationale for test
* refactor: per review
* chore: fmt
