fix(query): fix to_iso8601 function append format in negative timezone or "z"  

refactor: adjust vnode queue

fix: add group id to sort operator

enh(query): add histogram function distributed splitting 

enh: rm invalid file

fix: fix in compare issue

fix: add  group id to multiway merge operator

enh: index support between

fix: minor optimization for tsrow

"-hh", "z" when digits exceeds 10 digits

refactor: add sync sem for vnode

refactor: do some internal refactor.

refactor: do some internal refactor.

fix: compare group id first when choose from loser tree

fix(tmq): status check