feat(store): add hosts.always_on flag (default on)

internal/store/hosts_always_on_test.go

@@ -0,0 +1,46 @@
+package store
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func TestHostAlwaysOnDefaultAndToggle(t *testing.T) {
+	ctx := context.Background()
+	st := openTestStore(t)
+
+	h := Host{
+		ID: "h-always-on", Name: "lap", OS: "linux", Arch: "amd64",
+		ProtocolVersion: 1, EnrolledAt: time.Now().UTC(),
+	}
+	if err := st.CreateHost(ctx, h, "tok-hash", "pin"); err != nil {
+		t.Fatalf("create host: %v", err)
+	}
+	got, err := st.GetHost(ctx, h.ID)
+	if err != nil {
+		t.Fatalf("get host: %v", err)
+	}
+	if !got.AlwaysOn {
+		t.Fatalf("new host should default to always_on=true, got false")
+	}
+
+	if err := st.SetHostAlwaysOn(ctx, h.ID, false); err != nil {
+		t.Fatalf("set always_on: %v", err)
+	}
+	got, err = st.GetHost(ctx, h.ID)
+	if err != nil {
+		t.Fatalf("get host 2: %v", err)
+	}
+	if got.AlwaysOn {
+		t.Fatalf("expected always_on=false after toggle, got true")
+	}
+
+	hosts, err := st.ListHosts(ctx)
+	if err != nil {
+		t.Fatalf("list hosts: %v", err)
+	}
+	if len(hosts) != 1 || hosts[0].AlwaysOn {
+		t.Fatalf("ListHosts should report always_on=false, got %+v", hosts)
+	}
+}