docs: add session archiver to architecture diagram on website (#7)

Author: profbernardoj

docs/index.html

@@ -515,7 +515,8 @@ <h2>Under the Hood</h2>
 ├── <span class="hl3">Everclaw</span> <span style="color: var(--text-muted);">(decentralized inference)</span>
 │   ├── Morpheus API Gateway <span style="color: var(--text-muted);">— open access, cloud</span>
 │   ├── Morpheus P2P Proxy <span style="color: var(--text-muted);">— local, staked MOR</span>
-│   └── Gateway Guardian v4 <span style="color: var(--text-muted);">— billing-aware self-healing watchdog</span>
+│   ├── Gateway Guardian v4 <span style="color: var(--text-muted);">— billing-aware self-healing watchdog</span>
+│   └── Session Archiver <span style="color: var(--text-muted);">— prevents dashboard overload</span>
 └── <span class="hl">SmartAgent Config</span>
     ├── SOUL.md <span style="color: var(--text-muted);">— agent personality</span>
     ├── AGENTS.md <span style="color: var(--text-muted);">— workspace conventions</span>