7126886b81
Iteration 3 completion (tasks 5-6): the construction vocabulary gains the slot its own #125 scope-cut comment anticipated. Op::Doc { text } is the op-script twin of the builder's .doc(...) -- a closed, typed metadata construct (C25, no logic content); at most one per script, a second refuses via OpError::DuplicateDoc (the existing duplicate-fault family), rendered "a doc op may appear at most once". GraphSession threads the text through Composite::with_doc at finish, so op-built composites pass the C29 store gate like builder-built ones. The op-script register test runs on the described variant (SIGNAL_DOC_DESCRIBED) for both shapes; the doc-less script now pins the C29 refusal, and the E2E phase added the RestatesName op-script case. Full gates: cargo test --workspace green (98 suites, 0 failed); clippy -D warnings clean. refs #316