make storage versioning per-project + few other refactors

apps/web/src/services/storage/migrations/index.ts

@@ -1,11 +1,10 @@
 export { StorageMigration } from "./base";
-export { StorageVersionManager } from "./version-manager";
 import { V0toV1Migration } from "./v0-to-v1";
 import { V1toV2Migration } from "./v1-to-v2";
 import { V2toV3Migration } from "./v2-to-v3";
 export { runStorageMigrations } from "./runner";
 
-export const CURRENT_STORAGE_VERSION = 3;
+export const CURRENT_PROJECT_VERSION = 3;
 
 export const migrations = [
 	new V0toV1Migration(),