chore: pin unified Use registry baseline

[ZhiXiao-Lin]

Summary

• pin crates/use to merged Use PR chore: sync Parser PDF inventory reuse #77 (6c2299bbcfe27e462625a2ee89045f7063676dc6)
• pin crates/cli to merged CLI PR chore: sync OCI arm64 composition evidence #95 (82d09086c3fed5fa11b7739b4d31cb4e91d39a71)
• update the root README for manager tools v4, CLI operation record v3, the sole canonical Registry ACL, install-time source selection, and provenance-pinned upgrade/uninstall
• preserve the preview/not-released product boundary
• leave packages/science uninitialized and pinned unchanged at 225642b60be5494698a0cf8803994f44f9959d9e

Validation

• git diff --check
• Use PR chore: sync Parser PDF inventory reuse #77 CI: Linux, macOS, and Windows passed
• CLI PR chore: sync OCI arm64 composition evidence #95 CI: fmt, clippy, full tests, installer matrices, TUI regression, and release builds passed on Linux, macOS, and Windows
• local CLI cargo test --workspace --all-targets passed
• staged root scope contains only README.md, crates/use, and crates/cli