Stability Fixes

• fsync on BucketIndex writes by @SirTyson in #4549. Improve crash-resistance of bucket index files.
• Add docs for Ubuntu 24.04 builds by @SirTyson in #4505
• Document TRY_AGAIN_LATER and FILTERED error codes in tx endpoint by @marta-lokhova in #4499
• Fix tracy by @graydon in #4500
• Skip DB migration on nodes where publish is disabled by @marta-lokhova in #4509
• error -> warn on archive access issues by @ThomasBrady in #4508
• Do not attempt to recover files when minimal catchup is performed by @marta-lokhova in #4513
• Clean RUST_TARGET_DIR when soroban rlibs change by @graydon in #4510
• Split out --enable-tracy-memory-tracking, disabled by default by @graydon in #4512
• Update stellar-core p22 env submodule to rc3 by @anupsdf in #4515
• Revert downgrading of log error->warn->error by @ThomasBrady in #4511
• Extract rust-toolchain.toml channel, pass to submodules by @graydon in #4518
• Update soroban p21 version to 21.2.2, taking binary-search change. by @graydon in #4519
• More asan and tracy fixes by @graydon in #4525
• Resource calculator: rework to calculate multiple deployment phases at once by @MonsieurNicolas in #4532
• Error and exit on validator configs that contain only LOW validators by @bboston7 in #4528
• Fix incorrect argument names for --trusted-hash-file in commands.md by @ThomasBrady in #4531
• Cleanup apply and validation flows by @marta-lokhova in #4471
• Add a test that covers transaction set building logic on randomized data. by @dmkozh in #4507
• Misc fixes/improvements for tx generator. by @dmkozh in #4529
• Bump core to env v22.0.0 commit and fix build by @sisuresh in #4537
• Wait on merges in apply-load by @sisuresh in #4538
• Update resource calculator with latest soroban resource limits by @anupsdf in #4540
• Rewrite versioning-soroban.md to account for recent changes by @graydon in #4514
• null check dynamic casts by @SirTyson in #4548
• De-dupe inbound SCP traffic by @marta-lokhova in #4544
• Harden publishing by @marta-lokhova in #4555
• Archival bucketlist by @SirTyson in #4403
• Improves stellar-core-debug-info script and adds docs by @SirTyson in #4553
• Visual C++ - don't pass the release flag to cargo for debug builds by @MonsieurNicolas in #4560
• Handle soroban loadgen mode misconfig gracefully by @ThomasBrady in #4559
• Remove extra arg in LedgerCloseData constructor call for non buildtest by @ThomasBrady in #4563

New Features

• Incremental verify checkpoints by @ThomasBrady in #4487
• Enable background overlay by default, drop 'experimental' prefix by @marta-lokhova in #4534
• Add new catchup mode to use transaction results to skip failed transaction and signature verification by @ThomasBrady in #4536
• Add script to generate transaction histograms from Hubble data by @bboston7 in #4554

Breaking Changes

• publish: build checkpoint files during ledger close by @marta-lokhova in #4446. Drop support for txhistory, txsethistory and upgradehistory SQL tables. Drop --force-back option from run command.

Future Deprecation Warning

• The support for --in-memory mode will be dropped in the next release.

Full Changelog: v22.0.0...v22.1.0rc2