* chore: update wallet creation to use watch-only-descriptor-wallet
* remove duplicate version check
* fix: update release URL in install script and correct typo in wallet import message
* ci: test amd64 image descriptor wallet migration with Bats
* ci: boot amd64 image tests with OVMF pflash
* fix: gate descriptor wallet migration on Bitcoin Core v30
Detect the connected Bitcoin Core version over RPC before migrating.
Keep wallet.dat for v29.x or when the version cannot be determined.
Add regression coverage for both migration and compatibility paths.
* ci: make amd64 image tests independent of guest apt
Inject a pinned bats-core checkout into the temporary VM instead of
installing Bats through the guest package repositories.
Remove the duplicate pull request trigger and simplify artifact lookup.
* ci: harden image build run
* docs(FAQ): how automatic migration works
