Verify MEMORY.md captured July 4 rules (self-re-arm + substrate_leak_scrub); if missing, append

Two-night deferred verification from July 4 and July 5 reflection crons. At lease: grep ~/agents/carson-engineer/MEMORY.md for markers: (1) rule that repeating-decision AIs must self-re-arm in result-writing step; (2) rule that standup send-side guards include substrate_leak_scrub for /Cross-context|substrate|binding denied|retry_count|heartbeat recovery|poison[- ]?pill|lease[- ]?expired|webchat.?slack/i patterns. If either rule is missing, append a dated 2026-07-06 section with both rules. If both present, task event confirming and complete. This retires the deferred-verification risk-accept.