docs: add raven-notify to architecture flow diagram

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

flow.html

@@ -35,6 +35,12 @@ flowchart TD
         searxng["SearXNG :8600"]
     end
 
+    subgraph notify ["Notification Agent"]
+        raven["raven-notify :8400"]
+        discord["Discord webhook"]
+        email["Gmail SMTP"]
+    end
+
     subgraph external ["External Sources"]
         github["GitHub API"]
         opnsense["OPNsense changelog"]
@@ -51,8 +57,8 @@ flowchart TD
     end
 
     subgraph storage ["Shared Storage — /opt/"]
-        sites["sites/\nchangelog/  varys/  bran/  sam/"]
+        sites["sites/\nchangelog/  varys/  bran/  sam/  citadel/  raven/"]
-        agentOS["agent-os/logs/\nbran-changelog/  varys-monitor/  sam-research/"]
+        agentOS["agent-os/logs/\nbran-changelog/  varys-monitor/  sam-research/  citadel-mcp/  raven-notify/"]
     end
 
     subgraph serving ["Serving Layer"]
@@ -77,6 +83,9 @@ flowchart TD
     hodor --> bran
 
     varys -->|HTTP GET| svc
+    varys -->|POST /notify on down/recovery| raven
+    raven -->|webhook| discord
+    raven -->|SMTP| email
 
     sam -->|GET /search| searxng
     searxng -->|results| web_ext
@@ -86,6 +95,8 @@ flowchart TD
 
     openwebui -->|web_search MCP tool| citadel
     citadel -->|GET /search| searxng
+    openwebui -->|sam_research MCP tool| citadel
+    citadel -->|POST /research| sam
 
     bran -->|index.html + last-output.md| sites
     bran -->|last-run.json| agentOS
@@ -93,6 +104,10 @@ flowchart TD
     varys -->|last-run.json| agentOS
     sam -->|index.html + last-output.md| sites
     sam -->|last-run.json| agentOS
+    citadel -->|index.html + last-output.md| sites
+    citadel -->|last-run.json| agentOS
+    raven -->|index.html + last-output.md| sites
+    raven -->|last-run.json| agentOS
 
     sites --> nginx
     nginx -->|NPM proxy| web