fix(tsdb/cache): fix block index ref releasing

fix(tsdb/read): remove duplicate schema fetching

fix: fix max/min(tag) random result

test: reopen tmqDelete-1ctb.py

fix: the precision of delete statement

fix: error querying after setting permissions for varchar type tags

add cancel in fetch cluster

enh: refactor some sync func names

merge main

fix: show user privileges invalid write

fix(udf1): use 1 as luck number to make new gcc happy

fix(tsdb/cache): skip schema updating for non ts row

merge main

fix(shell): update the double display.

test: add udf function return with varchar demo