Postgresql 13 will no longer be supported by Django 5.2

[FroggyFlox]

I'm just creating this issue as a note and to set a reminder for our future upgrade to the next Django LTS 5.2: that version will drop support for Postgresql 13 so we will need to upgrade our Postgresql version used first.
https://docs.djangoproject.com/en/dev/releases/5.2/#dropped-support-for-postgresql-13

[phillxnet]

Linking to the issues/pull-requests associated with when we last did this re 10 to 13 Postgresql:

This repo

• Update DB format on install/upgrade if required Update DB format on install/upgrade if required #58
• Update DB format on install/upgrade if required Update DB format on install/upgrade if required #58 Update DB format on install/upgrade if required #58 #59

rockstor-core

• Establish Postgres database format upgrade: Establish Postgres database format upgrade rockstor-core#2780
• Establish Postgres database format upgrade ...: Establish Postgres database format upgrade #2780 rockstor-core#2787

The shell script added in rockstor-core should similarly service a 13 to 15 (or whatever) db format change, we just need to pass the appropriate versioning parameters to trigger the format update we plan to enact.

I.e. the script we added back-then works via the following parameters:

FROM_VERSION="$1"
TO_VERSION="$2"