Always run migrations

[mvarrieur]

Summary

• Runs database migrations inside server.js before importing the SvelteKit handler or listening for requests.
• Refactors migrate.js into a reusable runMigrations() helper while preserving direct node migrate.js usage.
• Simplifies Docker startup to node server.js, relying on the server’s migration gate instead of duplicating migration logic in the Docker command.
• Documents that production/preview startup applies migrations before serving and exits loudly if migration fails.

[hawkinslabdev]

That's a nice addition; and I've known at least 3 people to rely on the package right now (one of which I know personally) - so a higher contract number doesn´t seem necessary. Go ahead, feel free to clean up the export. I do however would like to keep the README.md clean, would you be able to remove the contract reference over there?

Nice addition overall @mvarrieur!

[mvarrieur]

@hawkinslabdev updated to just contain the enforced migrations changes!

[hawkinslabdev]

Appreciate the contribution again; merged!