test: valgrind case

feat: the 'null' value for the user is of type 'varchar(0)'

fix: hanlde the error if propose failed

test: del nouse test case

enh: refactor client queue

fix: fix client memory leak

test: valgrind case

fix(query): always generated results for last_row query if rows exists.

refact: row format

enh: adjust vnode fetch queue number

fix(query): fix invalid read for setSelectivity

refactor: do some internal refactor.

TD-17040

ci(stream): interval retrive

refactor(tmq): prepare only needed

fix: fix null bytes issue

feat(stream): sliding window

test：update test cases