test(#291): add test for connection limit per workspace

Add test to verify workspace connection limit enforcement.
Default limit is 100 connections per workspace.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

apps/api/src/federation/connection.service.ts

@@ -25,6 +25,7 @@ import type { PublicInstanceIdentity } from "./types/instance.types";
 @Injectable()
 export class ConnectionService {
   private readonly logger = new Logger(ConnectionService.name);
+  private readonly MAX_CONNECTIONS_PER_WORKSPACE = 100;
 
   constructor(
     private readonly prisma: PrismaService,
@@ -40,6 +41,17 @@ export class ConnectionService {
   async initiateConnection(workspaceId: string, remoteUrl: string): Promise<ConnectionDetails> {
     this.logger.log(`Initiating connection to ${remoteUrl} for workspace ${workspaceId}`);
 
+    // Check connection limit for workspace
+    const connectionCount = await this.prisma.federationConnection.count({
+      where: { workspaceId },
+    });
+
+    if (connectionCount >= this.MAX_CONNECTIONS_PER_WORKSPACE) {
+      throw new BadRequestException(
+        `Connection limit reached for workspace. Maximum ${String(this.MAX_CONNECTIONS_PER_WORKSPACE)} connections allowed per workspace.`
+      );
+    }
+
     // Fetch remote instance identity
     const remoteIdentity = await this.fetchRemoteIdentity(remoteUrl);