Fix: Revert MongoDB connection logic to respect API key prefix to avoid network isolation issues in Swarm deployments

src/lib/actions/agents.ts

@@ -34,8 +34,8 @@ export async function getAgents(clientSiteUuid?: string): Promise<Agent[]> {
       SITE_UUID = user.site_uuid;
     }
 
-    // All agent data comes from MongoDB agent_registry if MONGODB_URI is provided or API key is sk_db_
-    if (process.env.MONGODB_URI || (API_KEY && API_KEY.startsWith("sk_db_"))) {
+    // All agent data comes from MongoDB agent_registry (single source of truth)
+    if (API_KEY && API_KEY.startsWith("sk_db_")) {
       const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://127.0.0.1:27017/backone_dpi';
 
       try {
@@ -79,7 +79,7 @@ export async function getAgents(clientSiteUuid?: string): Promise<Agent[]> {
 export async function getAgent(agentId: string): Promise<Agent | null> {
   try {
     const API_KEY = getApiKey();
-    if (process.env.MONGODB_URI || (API_KEY && API_KEY.startsWith("sk_db_"))) {
+    if (API_KEY && API_KEY.startsWith("sk_db_")) {
       const agents = await getAgents();
       return agents.find(a => a.uuid === agentId || String(a.id) === agentId) || null;
     }