Set type and name not null

[jesusbv]

• Update Server properties type and name to not allow null values

[jesusbv]

[rtamalin]

We could potentially clean this up a bit by defining the ENUM once instead of using duplicate definitions here in the op.alter_column() statements.

The auto-generated code is a little dumb in this regard. ;-)

I'm sure that under the hood SQLAlchemy/PostgreSQL are detecting equivalency but it would probably make the code look cleaner.

[jesusbv]

Yes, I know what you mean, and I have done some refactoring in other PRs but, as a rule thumb, if the auto-generated code by alembic does not need any change, leave like that (i.e. IPv6 PR)

[rtamalin]

Same as above; we can define the ENUM once, and reference it in all the statements.

[rtamalin]

In general the changes are good.

However the auto-generated code has a lot of unnecessary repetition, and a little cleanup would code eliminate that and make it more readable.

[rtamalin]

For reference see the sort of cleanup work I did in the alembic migration script in #89 (currently in Draft and incorrectly thinks that the #88 changes are part of it too ;-) ) in the b9fcf24cc26a_images_non_null_updates.py file.