feat: Add migrateName property to StoreFileStat

This refactor adds a new property, migrateName, to the StoreFileStat type in the main.ts file. The migrateName property is used to specify the name of the migration process for migrating the store file to a new schema version. This change enhances the flexibility and extensibility of the StoreFileStat type, allowing for easier management of schema migrations in the database.

packages/types/src/main.ts

@@ -130,6 +130,12 @@ export type StoreFileStat = StoreFileId & {
    */
   readonly changeDebounce?: number;
 
+  /**
+   * The name of the migration process.
+   * This is used to migrate the store file to a new schema version.
+   */
+  readonly migrateName?: string;
+
   /**
    * The time-to-live (TTL) of the store file in memory.
    */