Reconcile dangling untracked draft plans; remove stray binary from repo root

[mostlydev]

Part of #302 (Phase 0). Repo hygiene per the issue-first workflow: planning lives in issues (or committed docs/plans/ documents linked from issues), not in untracked local files.

Untracked files needing disposition

File	Proposed disposition
docs/plans/2026-04-16-intrusion-detection-master-claw-wake-draft.md	Fold summary + open privilege question into an issue; delete file (blocked on auto-injected-privilege decision)
docs/plans/2026-04-16-nanoclaw-as-claude-code-runner-draft.md	Fold into its issue (driver refactor + MCP pipeline tracks); delete or commit
docs/plans/2026-04-29-issue-137-picoclaw-gateway-port.md	Attach to #137 (commit + link, or fold into issue body)
docs/plans/2026-04-29-salience-memory-adapter.md	Commit + link from #164 — plan has a Round 2 approval; this is ready work being lost
docs/plans/2026-04-30-issue-218-cllama-infers-self-history-identity.md	Attach to #218 (Phase 2 clawdapus side unlanded)
docs/plans/2026-05-09-issue-224-claw-up-fix-descriptor-refresh.md	Commit + link from #224
docs/plans/2026-05-12-issue-235-claw-authored-skills-persistence.md	Commit + link from #235 — plan has integrated Round 2 approval
channel-memory (repo root)	Stray locally-compiled arm64 Mach-O binary; delete and add pattern to .gitignore

Acceptance

• git status shows none of the above as untracked.
• Every surviving plan is committed and linked from its issue; every deleted plan's substance lives in its issue.

[mostlydev]

Disposition update from cleanup branch: orphan security-observability draft folded into #313, orphan nanoclaw-runner draft folded into #314, the unlinked Mermaid scratch diagram was removed, and surviving plan artifacts were linked from #137, #164, #218, #224, and #235.