Merge bitcoin/bitcoin#34249: doc: archive v30.2 release notes

f664860e52 doc: archive v30.2 release notes (fanquake)

Pull request description:

  Archive v30.2 release notes.

ACKs for top commit:
  furszy:
    ACK f664860e52
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Tree-SHA512: 0c300f5185d672f8e5d9f65f34506172958954b7afbfe38f0d558ea91eafa44ac0cea55ef60f28d2d8120f4bd2618dbcd8f88796a89beda59f5c2a8ae227c9ac

doc/release-notes/release-notes-30.2.md

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+v30.2 Release Notes
+===================
+
+Bitcoin Core version v30.2 is now available from:
+
+  <https://bitcoincore.org/bin/bitcoin-core-30.2/>
+
+This release includes new features, 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
+===============
+
+### Wallet
+
+- #34156 wallet: fix unnamed legacy wallet migration failure
+- #34215 wallettool: fix unnamed createfromdump failure walletsdir deletion
+- #34221 test: migration, avoid backup name mismatch in default_wallet_failure
+
+### IPC
+
+- #33511 init: Fix Ctrl-C shutdown hangs during wait calls
+
+### Build
+
+- #33950 guix: reduce allowed exported symbols
+- #34107 build: Update minimum required Boost version
+- #34227 guix: Fix osslsigncode tests
+
+### Test
+
+- #34137 test: Avoid hard time.sleep(1) in feature_init.py
+- #34226 wallet: test: Relative wallet failed migration cleanup
+
+### Fuzz
+
+- #34091 fuzz: doc: remove any mention to address_deserialize_v2
+
+### Doc
+
+- #34182 doc: Update OpenBSD Build Guide
+
+### Misc
+
+- #34174 doc: update copyright year to 2026
+
+Credits
+=======
+
+Thanks to everyone who directly contributed to this release:
+
+- Ava Chow
+- brunoerg
+- davidgumberg
+- fanquake
+- furszy
+- Hennadii Stepanov
+- MarcoFalke
+- Ryan Ofsky
+
+As well as to everyone that helped with translations on
+[Transifex](https://explore.transifex.com/bitcoin/bitcoin/).