feat(iac): scaffold orca-platform layout (M1.1)

Lands manifests/, overlays/, dns/, scripts/, Makefile per M1.1. Bundles yourplatform.com→breakpilot.com rename. vms/ removed (out-of-scope for Orca).

Refs: M1.1

manifests/vm-data/mongodb.toml

@@ -0,0 +1,21 @@
+# mongodb stub — full config lands in M6.x.
+# Host: vm-data. Resource budget per INFRASTRUCTURE.md §6 co-tenant notes.
+
+[[service]]
+name = "mongodb"
+image = "mongo:7"
+port = 27017
+
+[service.placement]
+node = "vm-data"
+
+[service.resources]
+memory = "2Gi"
+cpu = 1.0
+
+[service.volume]
+path = "/data/db"
+
+[service.env]
+MONGO_INITDB_ROOT_USERNAME = "${secrets.MONGO_ADMIN_USER}"
+MONGO_INITDB_ROOT_PASSWORD = "${secrets.MONGO_ADMIN_PASSWORD}"