fix: Fix non-ASCII character corruption in `FileSystemStorageClient` … #3952

Job	Run time
Type check / Type check (3.10)	43s
Type check / Type check (3.11)	50s
Type check / Type check (3.12)	52s
Lint check / Lint check (3.11)	31s
Type check / Type check (3.14)	50s
Lint check / Lint check (3.10)	24s
Type check / Type check (3.13)	49s
Lint check / Lint check (3.14)	24s
Lint check / Lint check (3.12)	24s
Lint check / Lint check (3.13)	23s
Docs check / Docs check	1m 50s
Unit tests / Unit tests (ubuntu-latest, 3.14)	3m 9s
Unit tests / Unit tests (ubuntu-latest, 3.10)	3m 2s
Unit tests / Unit tests (windows-latest, 3.14)	4m 56s
Unit tests / Unit tests (windows-latest, 3.11)	4m 21s
Unit tests / Unit tests (ubuntu-latest, 3.12)	3m 7s
Unit tests / Unit tests (ubuntu-latest, 3.13)	3m 7s
Unit tests / Unit tests (ubuntu-latest, 3.11)	2m 54s
Unit tests / Unit tests (windows-latest, 3.13)	5m 10s
Unit tests / Unit tests (windows-latest, 3.12)	5m 3s
Unit tests / Unit tests (windows-latest, 3.10)	4m 34s
	47m 23s

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