v1.2.640-nightly

What's Changed

Exciting New Features ✨

• feat(query): push rank limit into aggregate partial node by @sundy-li in #16466
• feat: add eliminate union optimizer rule by @xudong963 in #16478
• feat(query): parallel k way merge sort by @forsaken628 in #16340

Code Refactor 🎉

• refactor: add DatabaseMeta.gc_in_progress by @drmingdrmer in #16464
• refactor(query): use pipeline exchange to refactor window scatter by @zhang2014 in #16471
• refactor(query): simplify expression kernel by @sundy-li in #16482
• refactor: add KVPbCrudApi as abstraction layer for commonly used CRUD operations by @drmingdrmer in #16479
• refactor: add KVPbCrudApi::crud_try_insert() and crud_try_upsert() by @drmingdrmer in #16484
• refactor: SchemaApi::list_databases() by @drmingdrmer in #16485
• refactor: SchemaApi::get_database_history() by @drmingdrmer in #16487
• refactor: test SchemaApi::get_tenant_history_database() by @drmingdrmer in #16488
• refactor(query): refactor license manager by @zhang2014 in #16489

Others 📒

• chore(ci): remove hdfs release by @everpcpc in #16477
• chore(query): null first behavior by @sundy-li in #16475
• chore: update nom-rule by @andylokandy in #16483
• chore: bump proj4rs 0.1.4 by @b41sh in #16474

Full Changelog: v1.2.639-nightly...v1.2.640-nightly