update architecture to reflect decoupling productization

architecture-docs/architecture.dot

@@ -0,0 +1,32 @@
+// usage: nix-shell -p graphviz --command dot -T png -o architecture.png architecture.dot
+
+digraph FediversityArchitecture {
+  graph[fontname="Liberation Sans"];
+  node[shape=box, style="rounded", fontname="Liberation Sans"];
+
+  subgraph cluster_frontends {
+    label="front-ends";
+
+    tofu[label="OpenTofu CLI"];
+    panel[label="FediPanel"];
+    protagio[label="NixPanel"];
+  }
+
+  tofu -> core;
+  panel -> core;
+  protagio -> core;
+
+  core[label="fediversity-core"];
+
+  subgraph cluster_hypervisor {
+    label="proxmox";
+
+    nextcloud;
+    vaultwarden;
+    dots[label="..."];
+  }
+
+  core -> nextcloud;
+  core -> vaultwarden;
+  core -> dots;
+}