refactor: Own resolution fingerprints in repository (#13598)
## Intent
Make complete external-resolution generations self-contained and remove
the retained fingerprint callback.
## Changes
- Compute every package resolution fingerprint during normalized
generation construction.
- Remove `ClosureHasher`, `with_closure_hasher`,
`apply_resolution_fingerprints`, and `hash_sorted_closures`.
- Extract the historical lockfile-package Cap'n Proto layout and
xxHash64 primitive into cycle-free `turborepo-lockfile-hash`.
- Delegate existing `turborepo-hash` compatibility wrappers to the same
single schema and implementation.
- Remove the unused producer-level aggregate fingerprint so package
fingerprint ownership is unambiguous.
- Preserve exact historical fingerprint bytes and typed error chains.
## Testing
- `cargo test -p turborepo-lockfile-hash -p turborepo-hash -p
turborepo-repository -p turborepo-task-hash`
- 1 lockfile primitive test
- 25 hash tests
- 393 repository tests
- 18 task-hash tests
- `cargo clippy -p turborepo-lockfile-hash -p turborepo-hash -p
turborepo-repository -p turborepo-task-hash -p turborepo-lib
--all-targets -- -D warnings`
- Pre-push `format` and `check:toml` hooks
Advances TURBO-5799.
