fix: avoid double free conn

fix:give error if col is same in schemless & fix json parse error in TD-22903

fix: update docs for WAL_RETENTION_PERIOD, etc.

enh: sync log retention of mnode configurable with mndLogRetention

fix: add pre-finished stage, trans won't be dropped in follower if has undo actions while rollback

fix: create stream syntax check

enh: control frequency of mnode sdb flushing with mndSdbWriteDelta

fix: add pre-finished stage, trans won't be dropped in follower if it has undo actions while rollback

fix: set trans from rollback to undo if mnode not leader

add data scan

fix: the number of output lines is incorrect when the event window is used with the multiline function

fix: the number of output lines is incorrect when the event window is used with the multiline function

enh: fsync WAL idx and log when walRollImpl

fix: taosc crash caused of ordering by string

test：update test case for show command

ci:add cache in ci compling