migration: Write new data directory version if all migrations succeed #2946
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Migrations are applied if the app version number is higher than the data directory version number. Currently, the only existing migration writes the new version number to the data directory after applying its migration. Moving the data directory version write to the Migrator makes the code future-proof when we have multiple migrations.
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Migrations are applied if the app version number is higher than the data directory version number. Currently, the only existing migration writes the new version number to the data directory after applying its migration. Moving the data directory version write to the Migrator makes the code future-proof when we have multiple migrations.