* feat: ttl zero filter
* refactor: use TimeToLive enum
* fix: unit test
* tests: sqlness
* refactor: Option<TTL> None means UNSET
* tests: sqlness
* fix: 10000 years --> forever
* chore: minor refactor from reviews
* chore: rename back TimeToLive
* refactor: split imme request from normal requests
* fix: use correct lifetime
* refactor: rename immediate to instant
* tests: flow sink table default ttl
* refactor: per review
* tests: sqlness
* fix: ttl alter to instant
* tests: sqlness
* refactor: per review
* chore: per review
* feat: add db ttl type&forbid instant for db
* tests: more unit test
* tests: more flow testcase
* tests(WIP): more tests
* tests: more flow tests
* test: wired regex for sqlness
* refactor: put blog&example to two files
* generic bundle trait
* feat: impl get/let
* fix: drop batch
* test: tumble batch
* feat: use batch eval flow
* fix: div use arrow::div not mul
* perf: not append batch
* perf: use bool mask for reduce
* perf: tiny opt
* perf: refactor slow path
* feat: opt if then
* fix: WIP
* perf: if then
* chore: use trace instead
* fix: reduce missing non-first batch
* perf: flow if then using interleave
* docs: add TODO
* perf: remove unnecessary eq
* chore: remove unused import
* fix: run_available no longer loop forever
* feat: blocking on high input buf
* chore: increase threhold
* chore: after rebase
* chore: per review
* chore: per review
* fix: allow empty values in reduce&test
* tests: more flow doc example tests
* chore: per review
* chore: per review