fix: allow to rollback sync log buffer beyond startIndex with refill

fix: user auth error

fix(shell): fixed not last word matched

Test/td 20540

fix: mem leak td-21163

fix: remove invalid assert

enh: ignore head line in cvs file

fix: vnode snapshot rollback

fix: reduce drop dnode speed to make data more secure

docs(stream)

docs(stream)

fix(tsdb): default value of tsdbPageSize

fix: reset errorcode after check leader

fix: should not fsync in log level is error

enh(stream): forbid source db replica > 1