# What this PR does
Modifies the Django `settings/base.py` such that `REDIS_URI` can now be
a comma (or semicolon) separated list of URIs. From [Django
docs](https://docs.djangoproject.com/en/4.2/topics/cache/#:~:text=If%20you%20have%20multiple%20Redis%20servers%20set%20up%20in%20the%20replication%20mode%2C%20you%20can%20specify%20the%20servers%20either%20as%20a%20semicolon%20or%20comma%20delimited%20string%2C%20or%20as%20a%20list):
> If you have multiple Redis servers set up in the replication mode, you
can specify the servers either as a semicolon or comma delimited string,
or as a list. While using multiple servers, write operations are
performed on the first server (leader). Read operations are performed on
the other servers (replicas) chosen at random:
> ```python3
> CACHES = {
> "default": {
> "BACKEND": "django.core.cache.backends.redis.RedisCache",
> "LOCATION": [
> "redis://127.0.0.1:6379", # leader
> "redis://127.0.0.1:6378", # read-replica 1
> "redis://127.0.0.1:6377", # read-replica 2
> ],
> }
> }
> ```
## Checklist
- [ ] Unit, integration, and e2e (if applicable) tests updated (N/A)
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# Which issue(s) this PR fixes
- Fix issue that was causing our openapi schema to return HTTP 500 + add
an integration test which fetches the `.yaml` schema and validates that
the endpoint returns HTTP 200 (should hopefully prevent this from
happening again).
- add a few more type hints along the way
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
