Add alpha-hardening ADRs and issue plan from pre-release audit.

Lock alpha scope, tracker auth, TOPLOC fraud verification, and deferred multi-tracker money-path work; supersede legacy fraud issues with ADR-0018.

Co-authored-by: Cursor <cursoragent@cursor.com>

.scratch/alpha-hardening/issues/22-doc-memory-project-status.md

@@ -0,0 +1,21 @@
+Status: ready-for-agent
+
+# 22 — DOC: MEMORY.md + project-status alpha-hardening index
+
+## What to build
+
+Update persistent memory files so agents and humans find the alpha-hardening feature without stale handoff paths.
+
+## Acceptance criteria
+
+- [ ] `.claude/memory/MEMORY.md` — index entry for alpha-hardening (`.scratch/alpha-hardening/`, ADRs 0016–0019, issue count)
+- [ ] `.claude/memory/project-status.md` — brief alpha-hardening section: planning complete, Bucket 1 blockers next, link README
+- [ ] Cross-link `.scratch/alpha-hardening/handoff.md` from README (not temp path)
+
+## ADR links
+
+- [ADR-0016](../../docs/adr/0016-alpha-scope-and-known-limitations.md)
+
+## Blocked by
+
+None — parallel with other Bucket 3 doc issues