fix: last redundant read stt file

Update index.md

ci: add successful log

fix:auto fill null column

fix(query): remove assert

enh: not allow to propose if fsm applying progress lagging behind too far

fix:deal with ASSERT in tmq

enh: adjust the error msgs of sync not leader and sync is restoring

fix: add version to udfd conn req

fix:add log for taosx

feat: correct slimit&limit clause

change tag index case

* fix: taosbenchmark sub on 2.6 for main

* fix: upgrade taospy to 2.7.6 and fix unstable test case