fix(query): check for buffer in first/last merge.

refact: adjust some sync log and func return type

test: update coverage test script

test：add test case into ci

enh: java connector support get table vgid (#18981)

fix(meta/snap): use os memory instead of cache page replacement

fix(query): projection for null input

* java connector support get table vgid

* add export to com_taosdata_jdbc_TSDBJNIConnector.h

fix: fix mem leak

fix: avoid double-free in usedb req while db in creating state

fix(tdb): rollback in-memory pages

fix: disable insert csv statements on cloud services

fix(query): fix error.

* fix: taosbenchmark delay time for windows

* test: remove taosbenchmark deprecated paramter

* fix: update taos-tools 261fcca

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