feat: bind Host interfaces to scope Object lifetimes
Register explicit scope/name coordinates independently of Definition type. Require provider-attested current scope snapshots for fetch and dispatch, compare optional scope_ref at membership precedence, and retain the same Descriptor through result validation.
Migrate FS pinned-root boundaries and public self-scope example; document provider atomicity/lifecycle and root-only FS support. Add lifecycle, ref, replacement-race, root-lineage and compile-time exposure regressions.
Validation: cargo fmt --all --check; git diff --check; cargo check --workspace --all-targets; cargo test --workspace --all-targets and --doc (232 passing test-harness cases including doctests); nix develop --command cargo clippy --workspace --all-targets -- -D warnings; RUSTDOCFLAGS=-Dwarnings cargo doc --workspace --no-deps. Narrow wip-host suite also passed.
Hare
755e6aeb88