fix: route delegate session keys to correct agent loop (#127)

Delegate session keys (delegate:{uuid8}:{agentKey}:{delegationId}) were
not parsed by makeSchedulerRunFunc, causing fallback to default agent ID
which doesn't exist in managed-mode DBs. Add switch/case to handle both
agent: and delegate: prefixes.

cmd/gateway_consumer_process.go

@@ -14,10 +14,20 @@ import (
 // It extracts the agentID from the session key and routes to the correct agent loop.
 func makeSchedulerRunFunc(agents *agent.Router, cfg *config.Config) scheduler.RunFunc {
 	return func(ctx context.Context, req agent.RunRequest) (*agent.RunResult, error) {
-		// Extract agentID from session key (format: agent:{agentId}:{rest})
+		// Extract agentID from session key.
+		// Supported formats:
+		//   agent:{agentId}:{rest}
+		//   delegate:{sourceUUID8}:{targetAgentKey}:{delegationId}
 		agentID := cfg.ResolveDefaultAgentID()
-		if parts := strings.SplitN(req.SessionKey, ":", 3); len(parts) >= 2 && parts[0] == "agent" {
-			agentID = parts[1]
+		if parts := strings.SplitN(req.SessionKey, ":", 4); len(parts) >= 2 {
+			switch parts[0] {
+			case "agent":
+				agentID = parts[1]
+			case "delegate":
+				if len(parts) >= 3 {
+					agentID = parts[2]
+				}
+			}
 		}
 
 		loop, err := agents.Get(agentID)