v1.2.512-nightly

What's Changed

Thoughtful Bug Fix 🔧

• fix: fuse_snapshot only show the latest snapshot for external table by @dantengsky in #15721
• fix: fix union and lazy materialization by @xudong963 in #15727

Code Refactor 🎉

• refactor: delete raft log one by one. by @drmingdrmer in #15723

Others 📒

• chore(planner): fix merge predicates with different data types by @Dousir9 in #15725

Full Changelog: v1.2.511-nightly...v1.2.512-nightly