Add missing API files

Author: Jordan Halterman

api/atomix/runtime/v1/object.go

@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: 2022-present Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package v1
+
+type Revision uint64

api/atomix/runtime/v1/timestamp.go

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2022-present Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package v1
+
+import "time"
+
+type PhysicalTime = time.Time
+
+type LogicalTime uint64
+
+type Epoch uint64