docs: update all documentation for session changes

CLAUDE.md:
- Agent registry auto-heal note (in-memory, JWT fallback)
- Usage analytics (ClickHouse usage_events table)

HOWTO.md:
- Architecture diagram: added deploy-demo (NodePort 30092) and cameleer-demo namespace
- Access URLs: added Deploy Demo
- Agent registry: server restart resilience documentation
- Route control: CommandGroupResponse note

ui/README.md:
- Fixed outdated generate-api command
- Added DS version (v0.1.26)
- Fixed VITE_API_TARGET (30081 not 30090)
- Added key features section (cmd-k, LIVE mode, route control, event icons)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -37,11 +37,12 @@ java -jar cameleer3-server-app/target/cameleer3-server-app-1.0-SNAPSHOT.jar
 - Depends on `com.cameleer3:cameleer3-common` from Gitea Maven registry
 - Jackson `JavaTimeModule` for `Instant` deserialization
 - Communication: receives HTTP POST data from agents (executions, diagrams, metrics, logs), serves SSE event streams for config push/commands (config-update, deep-trace, replay, route-control)
-- Maintains agent instance registry with states: LIVE → STALE → DEAD
+- Maintains agent instance registry (in-memory) with states: LIVE → STALE → DEAD. Auto-heals from JWT claims on heartbeat/SSE after server restart. Route catalog falls back to ClickHouse stats for route discovery when registry has incomplete data.
 - Storage: PostgreSQL for RBAC, config, and audit; ClickHouse for all observability data (executions, search, logs, metrics, stats, diagrams)
 - Security: JWT auth with RBAC (AGENT/VIEWER/OPERATOR/ADMIN roles), Ed25519 config signing, bootstrap token for registration
 - OIDC: Optional external identity provider support (token exchange pattern). Configured via admin API, stored in database (`server_config` table)
 - User persistence: PostgreSQL `users` table, admin CRUD at `/api/v1/admin/users`
+- Usage analytics: ClickHouse `usage_events` table tracks authenticated UI requests, flushed every 5s
 
 ## CI/CD & Deployment