* Cleanup: parameters: extra=forbid, optimize: battery, inverter optional
* Don't allow extra fields for parameters/REST-API (at least for now while
changing API).
* Allow both battery and inverter to be set optionally (atm optional
battery not implemented, no API constraints).
* inverter: Remove default max_power_wh
* single_test_optimization: Add more cli-parameters
* Workflow docker-build: Don't try to authenticate for PRs
* Secrets are not available anyway for forks.
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