unified-storage: implement sqlkv Save method (#115458)

* unified-storage: sqlkv save method

pkg/storage/unified/sql/server.go

@@ -20,6 +20,8 @@ import (
 	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/storage/unified/resource"
 	"github.com/grafana/grafana/pkg/storage/unified/sql/db/dbimpl"
+	"github.com/grafana/grafana/pkg/storage/unified/sql/rvmanager"
+	"github.com/grafana/grafana/pkg/storage/unified/sql/sqltemplate"
 )
 
 type QOSEnqueueDequeuer interface {
@@ -103,11 +105,34 @@ func NewResourceServer(opts ServerOptions) (resource.ResourceServer, error) {
 				return nil, fmt.Errorf("error creating sqlkv: %s", err)
 			}
 
-			kvBackend, err := resource.NewKVStorageBackend(resource.KVBackendOptions{
+			kvBackendOpts := resource.KVBackendOptions{
 				KvStore: sqlkv,
 				Tracer:  opts.Tracer,
 				Reg:     opts.Reg,
+			}
+
+			ctx := context.Background()
+			dbConn, err := eDB.Init(ctx)
+			if err != nil {
+				return nil, fmt.Errorf("error initializing DB: %w", err)
+			}
+
+			dialect := sqltemplate.DialectForDriver(dbConn.DriverName())
+			if dialect == nil {
+				return nil, fmt.Errorf("unsupported database driver: %s", dbConn.DriverName())
+			}
+
+			rvManager, err := rvmanager.NewResourceVersionManager(rvmanager.ResourceManagerOptions{
+				Dialect: dialect,
+				DB:      dbConn,
 			})
+			if err != nil {
+				return nil, fmt.Errorf("failed to create resource version manager: %w", err)
+			}
+
+			// TODO add config to decide whether to pass RvManager or not
+			kvBackendOpts.RvManager = rvManager
+			kvBackend, err := resource.NewKVStorageBackend(kvBackendOpts)
 			if err != nil {
 				return nil, fmt.Errorf("error creating kv backend: %s", err)
 			}