chore: sync accumulated infra changes and docs

Removals: openwebui and netclaw compose + Traefik routes (both decommissioned).
Updates: litellm, n8n, vaultwarden, ai-agents, media, traefik routes, CLAUDE.md
(nodes/ports/known-issues), agent definitions.
Additions: Rongorongo tree, LinkedStorm plan, rename-bart spec, vllm brief,
tls-options and security-headers Traefik config.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/agents/documentation-keeper.md

@@ -142,6 +142,7 @@ When creating documentation:
 2. Full content in markdown format
 3. Mermaid diagrams embedded within the documentation
 4. Summary of what was documented and any follow-up actions needed
+5. Update the change logs
 
 When providing information to other agents:
 1. The specific information requested