fix: prevent duplicate platform websocket when nesting ApifyEventManager #955

Job	Run time
Checks / Unit tests / Unit tests (windows-latest, 3.14)	1m 37s
Checks / Website lint check	32s
Checks / Spell check	9s
Checks / Unit tests / Unit tests (windows-latest, 3.11)	1m 49s
PR title check	6s
Checks / Actions lint check	36s
Checks / Unit tests / Unit tests (windows-latest, 3.12)	1m 40s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.12)	1m 13s
Checks / Unit tests / Unit tests (windows-latest, 3.13)	1m 39s
Checks / Image lint check	9s
Checks / Integration tests (3.14, ubuntu-latest)	2m 41s
Checks / Markdown lint check	41s
Checks / Integration tests (3.11, ubuntu-latest)	4m 13s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.14)	1m 18s
Checks / E2E tests (3.11, ubuntu-latest)	4m 38s
Checks / Package check	22s
Checks / Lint check / Lint check (3.11)	12s
Checks / Type check / Type check (3.13)	11s
Checks / Type check / Type check (3.12)	12s
Checks / Doc check / Docs check	58s
Checks / Lint check / Lint check (3.14)	11s
Checks / E2E tests (3.14, ubuntu-latest)	5m 21s
Checks / Lint check / Lint check (3.12)	10s
Checks / Lint check / Lint check (3.13)	13s
Checks / Type check / Type check (3.14)	14s
Checks / Type check / Type check (3.11)	12s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.13)	1m 13s
Checks / Unit tests / Unit tests (ubuntu-latest, 3.11)	1m 12s
	33m 42s

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