feat: add empty client spool reconciliation

test/coverage.toml

@@ -170,6 +170,12 @@ layer = "unit"
 status = "implemented"
 tests = ["internal/client/agent/handshake_test.go:TestHandshakeRejectsNonWelcome_BH_SES_07"]
 
+[[requirements]]
+id = "HP-SES-08"
+layer = "unit"
+status = "implemented"
+tests = ["internal/client/agent/handshake_test.go:TestReconcileSnapshot_HP_SES_08"]
+
 [[requirements]]
 id = "HP-SES-05"
 layer = "integration"

test/integration/clientagent/clientagent_integration_test.go

@@ -39,4 +39,7 @@ func TestWebSocketHelloWelcome_HP_SES_06(t *testing.T) {
 	if result.ID == "" || result.Generation != 1 || result.Protocol.GetMajor() != 1 {
 		t.Fatalf("handshake result = %#v", result)
 	}
+	if reconciled, err := agent.Reconcile(ctx, transport, result, &rvboxv1.ReconcileSnapshot{}, agentproto.DefaultLimits()); err != nil || reconciled == nil {
+		t.Fatalf("empty reconciliation = %#v, %v", reconciled, err)
+	}
 }