SU.1058 Project document manager: check-out, revisions, release states

Asked: a document manager like a paid PDM, without that price (#1058; again #1129: "shouldn't have to pay to manage my own files").

Built (vault-09 2026-11-06, in /lab; docs/0.9-sessions/vault-09.md): the Documents panel over a project folder in CadCraft (View > More > Documents..., or DOCUMENTS), PartCraft and BimCraft (File > Documents...), and so in SuperCad Studio, which hosts them. Check out and in with a lock file two people respect, revision letters (A.1, A.2, A, B.1; ASME skip), states (work in progress, for review, released, obsolete) with the revision table and a revision block on the sheet, history of who did what, where-used and BOM (PartCraft assemblies, xrefs, IFC links), approver list and four eyes (LC.8 merged), title-block fields VAULT.REV/STATE/DATE/APPROVER, read-only guard on Save, cloud folders in Studio (server built). Walkthrough: help topic "Documents and revisions (the vault)" in the three apps.

Tested: lib/vault 141, UI 68, bridge 15, cloud 22, TWO REAL PROCESSES on one folder and on a cloud folder 86 (24 of 24 simultaneous check-outs, one winner each), walkthrough buttons 82; real pages 26+26+45 and Super 15; lock_ops.rs 4 under rustc. Found and fixed: BimCraft did not mount in Super.

Not built: the sheet set's index does not show each sheet's revision; Open copy and Compare only in CadCraft; the approver is a typed name; no cloud folder in a web tab (Studio first); the commands in desktop-shell are not cargo-compiled (Windows Studio 0.9 build). Real shared-folder check with two people: SU.1058-HAND.