doc: archive release notes for v29.4

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+Bitcoin Core version 29.4 is now available from:
+
+  <https://bitcoincore.org/bin/bitcoin-core-29.4/>
+
+This release includes various bug fixes and performance
+improvements, as well as updated translations.
+
+Please report bugs using the issue tracker at GitHub:
+
+  <https://github.com/bitcoin/bitcoin/issues>
+
+To receive security and update notifications, please subscribe to:
+
+  <https://bitcoincore.org/en/list/announcements/join/>
+
+How to Upgrade
+==============
+
+If you are running an older version, shut it down. Wait until it has completely
+shut down (which might take a few minutes in some cases), then run the
+installer (on Windows) or just copy over `/Applications/Bitcoin-Qt` (on macOS)
+or `bitcoind`/`bitcoin-qt` (on Linux).
+
+Upgrading directly from a version of Bitcoin Core that has reached its EOL is
+possible, but it might take some time if the data directory needs to be migrated. Old
+wallet versions of Bitcoin Core are generally supported.
+
+Compatibility
+==============
+
+Bitcoin Core is supported and tested on operating systems using the
+Linux Kernel 3.17+, macOS 13+, and Windows 10+. Bitcoin
+Core should also work on most other Unix-like systems but is not as
+frequently tested on them. It is not recommended to use Bitcoin Core on
+unsupported systems.
+
+Notable changes
+===============
+
+This release fixes an issue where the chainstate database would repeatedly
+rewrite large portions of itself, causing excessive disk reads and writes
+during normal operation.
+
+### Validation
+
+- #35209 validation: correct lifetime of precomputed tx data
+- #35465 coins: compact chainstate regularly
+
+### Leveldb
+
+- #61(bitcoin-core/leveldb): Disable seek compaction
+
+### Net
+
+- #34093 netif: fix compilation warning in QueryDefaultGatewayImpl()
+
+### Wallet
+
+- #35228 wallet: use outpoint when estimating input size
+
+### Build
+
+- #34228 depends: Unset SOURCE_DATE_EPOCH in gen_id script
+- #34848 cmake: Migrate away from deprecated SQLite3 target
+
+### Test
+
+- #34918 fuzz: [refactor] Remove unused g_setup pointers
+
+### Doc
+
+- #34510 doc: fix broken bpftrace installation link
+- #34561 wallet: rpc: manpage: fix example missing `fee_rate` argument
+- #34671 doc: Update Guix install for Debian/Ubuntu
+- #35283 doc: mention -DWITH_ZMQ=ON in BSD build guides
+
+### CI
+
+- #35202 ci: restore sockets in i686, no IPC job
+- #35378 ci: switch runners from cirrus to warpbuild
+- #35408 ci: 35378 followups
+
+### Misc
+
+- #35175 multi_index: fix compilation failure with boost >= 1.91
+
+Credits
+=======
+
+Thanks to everyone who directly contributed to this release:
+
+- andrewtoth
+- Cory Fields
+- Daniel Pfeifer
+- darosior
+- fanquake
+- Hennadii Stepanov
+- jayvaliya
+- junbyjun1238
+- Lőrinc
+- MarcoFalke
+- SomberNight
+- ToRyVand
+- willcl-ark
+
+As well as to everyone that helped with translations on
+[Transifex](https://explore.transifex.com/bitcoin/bitcoin/).