v27.1.0

What's Changed

• Delete .github/workflows/claude-review.yml by @leighmcculloch in #5314
• apply-load: use the operator-configured NETWORK_PASSPHRASE by @tamirms in #5319
• Bump min overlay version to v26 by @marta-lokhova in #5320
• Split test-lcm data into current/next tiers by @sisuresh in #5313
• Cleanup historical ledger query by @SirTyson in #5221
• Parallelize InMemoryIndex construction with bucket put loop. by @dmkozh in #5288
• Add random memo to apply-load transactions by @Shaptic in #5322
• Bucket query asserts and perf fix by @SirTyson in #5323
• Initialize Bucket directory after the database by @marta-lokhova in #5325
• Add new tests to purge scp slots by @marta-lokhova in #5324
• Cleanup herder repeated out of sync flow and add test by @marta-lokhova in #5327
• Experimental triggerNextLedger timer Change by @SirTyson in #4865
• fix query server assert when catching up by @SirTyson in #5329

Full Changelog: v27.0.0...v27.1.0