fix(sync): set standby when not follower

test: add notify between main script and comsume processor

test(stream): window close not work for stb

feat: order group by group id generated by partition

feat(stream): support snode

refactor(sync): propose fail when changing

refactor: rsma support max_delay/watermark params

tdb/ofp: support overflow pages for big data

refactor: save sdb file on needed

test: enable 5dnode3mnodeStop.py

feature: eliminate projection optimization

test : add test case for table comment

feat: fetch rsma result by timer supported

fix(query): select last(*) from super table returns 0 if all columns are NULL.