Complete REUSE-WP-0003: registry CLI, docs alignment, and coverage

Align INTENT.md with delivered layout, add CapabilityRegistryConcept guide,
extend schema with promotion_history, ship reuse-surface validate/query/export
CLI, register three more helix_forge capabilities, and refresh SCOPE and gap
analysis to reflect A3 tooling and D5/A3/C4/R2 self-assessment.

.claude/ralph-loop.local.md

@@ -0,0 +1,21 @@
+---
+active: true
+iteration: 1
+session_id: 
+max_iterations: 20
+completion_promise: "HEUREKA"
+workplan_id: REUSE-WP-0003
+workplan_file: /home/worsch/reuse-surface/workplans/REUSE-WP-0003-intent-scope-gap-closure.md
+started_at: "2026-06-14T23:09:59Z"
+---
+
+Read the workplan at `/home/worsch/reuse-surface/workplans/REUSE-WP-0003-intent-scope-gap-closure.md`.
+
+If every task has `status: done` AND frontmatter `status: done`:
+run `rm -f .claude/ralph-loop.local.md` first (deactivates the loop so the stop hook exits cleanly),
+then output <promise>HEUREKA</promise>.
+
+Otherwise implement the next `todo` task as described in the workplan.
+Set task `in_progress` when starting, `done` when complete.
+When all tasks are done set frontmatter `status: done`.
+