fix: insert varchar error

enh: speed up drop dnode and avoid snapshot transfer

fix: memory leak

fix: fix tbnameIn bug on normal table

fix:read data and compute group id

enh: add fail-fast

fix: fix count VAR type column error cause of reading incorrect sma results

refactor(sync): add reserved field in message

fix(query): check null ptr before dereferencing it.

enh: enable timeout checking of sync Resp with ttl as 30s

feat: add stream option 'delete_mark'

test: add cases for create and drop topic

incoorect sma results