feat(api): add OpenClawGatewayModule with agent registry (MS22-P1b)

apps/api/prisma/schema.prisma

@@ -1407,6 +1407,19 @@ model Instance {
   @@map("instances")
 }
 
+model OpenClawAgent {
+  id          String   @id @default(cuid())
+  name        String   @unique // "jarvis-main", "jarvis-projects", etc.
+  displayName String // "Jarvis (Main)", etc.
+  role        String // "orchestrator" | "developer" | "researcher" | "operations"
+  gatewayUrl  String // "http://jarvis-main:18789"
+  agentId     String   @default("main") // OpenClaw agent id within that instance
+  model       String // "zai/glm-5", "ollama/cogito"
+  isActive    Boolean  @default(true)
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+}
+
 model FederationConnection {
   id          String @id @default(uuid()) @db.Uuid
   workspaceId String @map("workspace_id") @db.Uuid