fix: Use same `client_key` for `Actor` created `request_queue` and improve its metadata estimation #622

Job	Run time
Lint check / Lint check (3.10)	9s
Lint check / Lint check (3.12)	10s
Type check / Type check (3.12)	27s
Type check / Type check (3.11)	26s
Type check / Type check (3.10)	26s
Lint check / Lint check (3.13)	12s
Unit tests / Unit tests (ubuntu-latest, 3.12)	26s
Lint check / Lint check (3.11)	10s
Unit tests / Unit tests (ubuntu-latest, 3.11)	24s
Unit tests / Unit tests (windows-latest, 3.11)	48s
Unit tests / Unit tests (windows-latest, 3.12)	53s
Unit tests / Unit tests (ubuntu-latest, 3.13)	39s
Docs check / Docs check	1m 13s
Unit tests / Unit tests (ubuntu-latest, 3.10)	22s
Unit tests / Unit tests (windows-latest, 3.10)	42s
Unit tests / Unit tests (windows-latest, 3.13)	54s
Integration tests / Integration tests (3.10)	10m 12s
Type check / Type check (3.13)	29s
Integration tests / Integration tests (3.13)	10m 7s
Integration tests / Approve integration tests for PRs from forks	0s
Integration tests / Integration tests for PRs from forks	0s
	29m 9s

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