# What this PR does
Related to https://github.com/grafana/oncall/issues/2392
- Re-enable the following `mypy` rules + fix their pre-existing errors:
- `no-redef`
- `valid-type`
- `var-annotated`
- Add stronger return typing to the `GrafanaAPIClient` by use of
generics + add some links to documentation in the method docstrings
## 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)
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