[LLSC-53] Replace alembic migrate on startup with SQLAchemy create table

[mslwang]

Notion ticket link

Remove Alembic migration on startup

The alembic.ini and env.py config is taking control of the logging system when running run_migrations using alembic.command

llsc/backend/app/models/__init__.py

Line 14 in b74cc47

def run_migrations():

, meaning errors that should normally be displayed are not being displayed.

This is a bigger priority for productivity to maintain over worrying about up-to-date database migrations, so we need to remove the current system of making sure databases are up to date.

We will replace this with SQLAlchemy create table, which creates tables based on the models, not the migrations. We should conduct a further investigation of whether migration-based table management will be necessary.

Implementation description

Steps to test

1. Clear docker volume for Postgres database
2. Start up server pdm run dev
3. Check if API can be hit and all tables are correct

What should reviewers focus on?

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

[mslwang]

As mentioned on slack, this is currently flawed because lookup tables aren't populated with this approach (eg. Roles table needs the database migration)