test(maintenance): add policy executor and handler tests

Табличные тесты PolicyExecutor, ConfigProvider reload, memory CRUD политик и 503 для /v1/maintenance/* на memory-бэкенде без PostgreSQL.

Co-authored-by: Cursor <[email protected]>

internal/maintenance/config_provider_test.go

@@ -0,0 +1,43 @@
+package maintenance
+
+import (
+	"context"
+	"testing"
+
+	"evobgp/internal/store"
+)
+
+func TestConfigProviderReloadAndSnapshot(t *testing.T) {
+	mem := store.NewMemory()
+	ret := 3600
+	if _, err := mem.CreateMaintenancePolicy(&store.MaintenancePolicy{
+		Name:               "p1",
+		TableName:          "job_audit",
+		Schedule:           "0 3 * * *",
+		RetentionPeriodSec: &ret,
+		Enabled:            true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	cp := NewConfigProvider(mem)
+	if err := cp.Reload(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+	snap := cp.Snapshot()
+	if len(snap) != 1 || snap[0].Name != "p1" {
+		t.Fatalf("snapshot: %+v", snap)
+	}
+
+	newName := "p1-updated"
+	if _, err := mem.UpdateMaintenancePolicy(snap[0].ID, &store.MaintenancePolicyPatch{Name: &newName}); err != nil {
+		t.Fatal(err)
+	}
+	if err := cp.Reload(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+	snap2 := cp.Snapshot()
+	if len(snap2) != 1 || snap2[0].Name != newName {
+		t.Fatalf("after reload: %+v", snap2)
+	}
+}