Util: Add PostgreSQL data migration script

[drikusroor]

Introduce a script to facilitate the migration of PostgreSQL data between versions, automating the process of dumping and restoring databases using Docker containers.

• Shut Down Containers: The script starts by bringing down all running containers and stopping the main database container.
• Capture Logs: It runs the database container to capture error logs that contain the PostgreSQL version information.
• Extract Versions: Using regex on the logs, it extracts the old and new PostgreSQL version numbers.
• Dump Data: It starts a temporary container running the old PostgreSQL version, waits for it to be ready, and then dumps the database using pg_dumpall.
• Clean Up: The dump file is verified, and the temporary container is stopped and removed along with the old data volume.
• Restore Data: A new temporary container is started using the new PostgreSQL version. The dump file is copied into this container, and the data is restored using psql.
• Restart Project: Finally, the script restarts the project using the updated configuration.

[Evert-R]

The script hangs here, with this error in the container in docker desktop:

2025-02-12 13:59:18 Error: Database is uninitialized and superuser password is not specified.
2025-02-12 13:59:18        You must specify POSTGRES_PASSWORD to a non-empty value for the
2025-02-12 13:59:18        superuser. For example, "-e POSTGRES_PASSWORD=password" on "docker run".
2025-02-12 13:59:18 
2025-02-12 13:59:18        You may also use "POSTGRES_HOST_AUTH_METHOD=trust" to allow all
2025-02-12 13:59:18        connections without a password. This is *not* recommended.
2025-02-12 13:59:18 
2025-02-12 13:59:18        See PostgreSQL documentation about "trust":
2025-02-12 13:59:18        https://www.postgresql.org/docs/current/auth-trust.html

[BeritJanssen]

I ran into something similar when doing this manually. I think what happens is that the env variables aren't loaded in this way. I solved it by running docker compose up db and then running the script afterwards.