fix: fix memleak during create initial sources for block merge sort

other: merge main.

fix stream fill issue

fix(tsdb/cache): move to stt next row if data file exausted

fix(stream): scan wal in step2

adjust history task trigger mode

enh/TD-24937：check cluster ttlChangeOnWrite consistency

fix(stream): 1. set correct timewindow after step2. 2. handle the case when the task is failed to be added into the meta store.

fix(tsdb/commit2): new maxDelKey for commit context

fix/TS-3708: check term for role time

docs: fix arch and refine udf doc

1. time of mnode becomes current role in this term
2. show 0 for offline mnodes

optimize session operator reload state

fix(stream): set the value of ratio of vnode stream thread factor to be 4.0 by default.