docs(plan): AnyEntry claims; the resource-construction campaign converges - #623

Two documentation changes that belong together: the resource-construction campaign's closure, and the
plan for the feature its last phase exposed.

The AnyEntry plan (#616)

docs/plans/any-entry-claims.md — six phases, eleven judgment scenarios, and an audit of all 27
announced file-provider methods.

Give the claim surface the permissive option the discovery surface already has. A mutation target's kind
is not the author's business — a move moves whatever is there — but the claim's Go type is the kind
assertion, so a kind-indifferent operation must either name a kind it does not care about or multiply
into one method per kind. file.AnyEntry asserts existence and nothing else, and resolves to the
observed kind inside the Pending → Active transition (Gone leaves it unasserted, because nothing was
observed) — the moment the model already consults the disk, through the seam op.RootBinder established
and the ledger swap rebindEntry already performs.

The payoff: file.move moves any kind again from a plain authored path, file.move_directory retires,
and a symbolic link can be moved — a capability that regressed when kind-honest activation landed (#611).

The surface audit found three more defects: file.remove's *Regular type contradicts its own
documentation ("file or empty directory"); file.unlink is the same operation as remove and retires;
file.remove_all is already rm -rf in its body, with the *Directory claim the only thing keeping it
off a file or a link. The removal family ends split by blast radius, never by kind — the stdlib's
split (os.Remove deliberately does not ask the kind; os.RemoveAll opens by calling Remove), which
is why Go never needed an Unlink. Also ruled: move loses on_missing (a nil product hands downstream
consumers a nil promise — the pathology that dropped Skip), and policy parameters go last.

Tasks: #617 – #622.

Resource-construction closure (#587)

The campaign converges. 4-resource-management.status.md states it — the design and the tree agree, and
the divergence table has no surviving row — with per-PR completion rows and an Outstanding list carrying
only what outlives the campaign. 4-resource-management.md's header reads implementation complete;
3.5.4-file-provider.md gains file.discover/file.resolve, file.move_directory, and the
kind-honest-claims paragraph; the transport plan's supersession note is finalized — what replaced
"recreate from slot URIs" is now named, so that plan's Goal holds for every addressing.

Docs only; no code changes. Closes #587. Refs #581, #616.

Gate: make test 103 ok / 0 fail; gofmt -l clean.