fix(ci): split release-plz into release-pr and release-tag jobs

chore: disable semver_check in release-plz (binary, not a crate)

chore: bump version to 0.35.0

fix(ci): remove cargo-semver-checks (binary, not a crate)

fix(semver): make SpendData pub(crate) instead of non_exhaustive

docs(claude): add prek local setup instructions

style(tests): apply cargo fmt formatting

docs(readme): add project structure, update install URL, normalize dashes

docs(claude): add git flow and CI/CD documentation

test(router,dlp): add tests to kill surviving mutants

chore: add musl cross-build config, remove leftover kraft.yaml

fix(ci): fix release flow — homebrew after release, tag push runs all jobs

fix(ci): make semver-checks non-blocking (continue-on-error)

fix(ci): add #[non_exhaustive] to SpendData to fix semver-checks

chore: release v0.34.0 (#79)