fix: Preserve count=0 in RunClient's charge #541

Job	Run time
Tests / Integration tests (3.11, ubuntu-latest)	2m 26s
Docstrings checks / Docstrings checks	13s
Tests / Integration tests (3.14, ubuntu-latest)	2m 42s
Code checks / Actions lint check	1m 31s
Code checks / Spell check	8s
PR title check	5s
Code checks / Lint check / Lint check (3.14)	15s
Doc checks / Doc checks / Docs check	1m 23s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	42s
Code checks / Lint check / Lint check (3.13)	10s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 1s
Code checks / Lint check / Lint check (3.12)	13s
Code checks / Lint check / Lint check (3.11)	14s
Code checks / Type check / Type check (3.11)	9s
Code checks / Type check / Type check (3.13)	12s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	37s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 4s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	43s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 5s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 9s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	41s
Code checks / Type check / Type check (3.12)	11s
Code checks / Type check / Type check (3.14)	12s
	17m 6s

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