v1.2.827-nightly

What's Changed

Exciting New Features ✨

• feat(query): introduce BackpressureSpiller by @forsaken628 in #18802
• feat: External UDF support STAGE_LOCATION param by @KKould in #18833

Thoughtful Bug Fix 🔧

• fix: deserialize parquet error when stream's base table modify column type by @zhyass in #18828

Code Refactor 🎉

• refactor: meta-client: consolidate RPC timing into RpcHandler by @drmingdrmer in #18832
• refactor: clarify the HTTP query lifecycle. by @youngsofun in #18787
• refactor: simplify mask policy storage structure by @TCeason in #18836

Others 📒

• chore: reduce log in update_multi_table_meta by @SkyFan2002 in #18844

Full Changelog: v1.2.826-nightly...v1.2.827-nightly