refactor!: Make `Actor` initialization stricter and more predictable #672

Job	Run time
Type check / Type check (3.10)	26s
Lint check / Lint check (3.12)	12s
Lint check / Lint check (3.11)	16s
Type check / Type check (3.13)	31s
Type check / Type check (3.11)	28s
Docs check / Docs check	59s
Lint check / Lint check (3.13)	12s
Lint check / Lint check (3.10)	12s
Unit tests / Unit tests (windows-latest, 3.11)	48s
Unit tests / Unit tests (ubuntu-latest, 3.11)	26s
Unit tests / Unit tests (windows-latest, 3.10)	49s
Unit tests / Unit tests (ubuntu-latest, 3.10)	26s
Unit tests / Unit tests (ubuntu-latest, 3.13)	28s
Unit tests / Unit tests (ubuntu-latest, 3.12)	27s
Unit tests / Unit tests (windows-latest, 3.13)	54s
Integration tests / Integration tests (3.10)	10m 44s
Type check / Type check (3.12)	29s
Unit tests / Unit tests (windows-latest, 3.12)	50s
Integration tests / Approve integration tests for PRs from forks	0s
Integration tests / Integration tests (3.13)	10m 36s
Integration tests / Integration tests for PRs from forks	0s
	30m 13s

Provide feedback