fix: Properly process pre-existing Actor input file #681

Job	Run time
Type check / Type check (3.10)	23s
Type check / Type check (3.11)	24s
Type check / Type check (3.12)	29s
Type check / Type check (3.13)	26s
Lint check / Lint check (3.11)	10s
Unit tests / Unit tests (windows-latest, 3.10)	50s
Lint check / Lint check (3.12)	12s
Docs check / Docs check	1m 3s
Unit tests / Unit tests (ubuntu-latest, 3.11)	24s
Unit tests / Unit tests (ubuntu-latest, 3.13)	26s
Unit tests / Unit tests (ubuntu-latest, 3.10)	27s
Lint check / Lint check (3.10)	10s
Unit tests / Unit tests (windows-latest, 3.12)	51s
Unit tests / Unit tests (windows-latest, 3.11)	48s
Unit tests / Unit tests (ubuntu-latest, 3.12)	24s
Integration tests / Approve integration tests for PRs from forks	13m 51s
Integration tests / Integration tests (3.10)	9m 20s
Unit tests / Unit tests (windows-latest, 3.13)	43s
Integration tests / Integration tests (3.13)	10m 1s
Lint check / Lint check (3.13)	11s
Integration tests / Integration tests for PRs from forks	0s
	41m 33s

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