Fix PowerDistributor: exclude inverters that didn't send any data #115

Job	Run time
Test documentation website generation	0s
Build distribution packages	16s
Cross-arch tests with nox (arm64, ubuntu-20.04, 3.11, pytest_min)	20m 40s
Test with nox (ubuntu-20.04, 3.11, ci_checks_max)	3m 31s
Cross-arch tests with nox (arm64, ubuntu-20.04, 3.11, pytest_max)	19m 53s
Test with nox (ubuntu-20.04, 3.11, pytest_min)	2m 5s
Cross-arch tests with nox (arm64, ubuntu-20.04, 3.12, pytest_min)	19m 46s
Test with nox (ubuntu-20.04, 3.12, ci_checks_max)	3m 48s
Cross-arch tests with nox (arm64, ubuntu-20.04, 3.12, pytest_max)	20m 17s
Test with nox (ubuntu-20.04, 3.12, pytest_min)	2m 46s
Test package installation in different architectures (ubuntu-20.04, 3.11)	2m 48s
Test package installation in different architectures (ubuntu-20.04, 3.12)	3m 2s
Test package installation in different architectures	1s
Test with nox	1s
Cross-arch tests with nox	1s
Publish documentation website to GitHub pages	34s
Create GitHub release	0s
Publish packages to PyPI	0s
	1h 39m 29s

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