Add project revision foundation

src/domain/ports/project-revision.store.ts

@@ -0,0 +1,43 @@
+export type ProjectRevisionSource =
+  | "user"
+  | "undo"
+  | "redo"
+  | "restore"
+  | "migration";
+
+export type ProjectChangeJsonValue =
+  | null
+  | boolean
+  | number
+  | string
+  | ProjectChangeJsonValue[]
+  | { [key: string]: ProjectChangeJsonValue };
+
+export interface ProjectChangePayload {
+  schemaVersion: number;
+  data: ProjectChangeJsonValue;
+}
+
+export interface AppendProjectRevisionInput {
+  projectId: string;
+  expectedRevision: number;
+  source: ProjectRevisionSource;
+  commandType: string;
+  description?: string;
+  actorId?: string;
+  forward: ProjectChangePayload;
+  inverse: ProjectChangePayload;
+}
+
+export interface AppendedProjectRevision {
+  revisionId: string;
+  changeSetId: string;
+  projectId: string;
+  revisionNumber: number;
+  createdAtIso: string;
+}
+
+export interface ProjectRevisionStore {
+  getCurrentRevision(projectId: string): number | null;
+  append(input: AppendProjectRevisionInput): AppendedProjectRevision;
+}