Features
* chore: update base image to go 1.21 by ngjaying in https://github.com/lf-edge/ekuiper/pull/2387
* chore: upgrade go and mods by ngjaying in https://github.com/lf-edge/ekuiper/pull/2388
* feat: support websocket connection as sink by Yisaer in https://github.com/lf-edge/ekuiper/pull/2374
* feat: support websocket source by Yisaer in https://github.com/lf-edge/ekuiper/pull/2392
* feat: support log level by Yisaer in https://github.com/lf-edge/ekuiper/pull/2394
* feat(httppull): support token in body by ngjaying in https://github.com/lf-edge/ekuiper/pull/2404
* feat: support validate rule response by Yisaer in https://github.com/lf-edge/ekuiper/pull/2397
* feat(io): add simulator source by ngjaying in https://github.com/lf-edge/ekuiper/pull/2405
* feat: support websocket client reconnect by Yisaer in https://github.com/lf-edge/ekuiper/pull/2409
* feat(trial): trial run runtime by ngjaying in https://github.com/lf-edge/ekuiper/pull/2412
* feat: support validate rule graph by Yisaer in https://github.com/lf-edge/ekuiper/pull/2410
* feat(helm): support ekuiper plugins volumes by Rory-Z in https://github.com/lf-edge/ekuiper/pull/2403
* feat: add foundationdb store by Rui-Gan in https://github.com/lf-edge/ekuiper/pull/2375
* feat(trial): 2 step trial start by ngjaying in https://github.com/lf-edge/ekuiper/pull/2419
Other changes
* fix(ci): lint apt update before install by ngjaying in https://github.com/lf-edge/ekuiper/pull/2400
* fix: fix several bugs about logs by Yisaer in https://github.com/lf-edge/ekuiper/pull/2393
* fix(proto): support enum list by ngjaying in https://github.com/lf-edge/ekuiper/pull/2399
* chore: add log for db connect by ngjaying in https://github.com/lf-edge/ekuiper/pull/2416
* fix(test): avoid db busy lock by ngjaying in https://github.com/lf-edge/ekuiper/pull/2418
* fix: skip install plugin conf if exists by Yisaer in https://github.com/lf-edge/ekuiper/pull/2413
* feat: support register websocket endpoint by Yisaer in https://github.com/lf-edge/ekuiper/pull/2417
* feat: revise websocket connection endpoint by Yisaer in https://github.com/lf-edge/ekuiper/pull/2420
* feat: support kafka source rewindable by Yisaer in https://github.com/lf-edge/ekuiper/pull/2401
**Full Changelog**: https://github.com/lf-edge/ekuiper/compare/1.12.0-alpha.4...1.12.0-beta.1