perf: remove intermediate activities after stream ends #3294

Job	Run time
Print commit stats	1m 3s
Verify build-browser (ubuntu-latest)	51s
Build samples	24s
Verify build-browser (windows-latest)	2m 3s
Build	4m 59s
Verify build-browser (macos-26)	46s
Static code analysis	4m 8s
Unit test	3m 18s
Type definitions test	2m 16s
HTML test (2/17)	7m 37s
HTML test (4/17)	7m 34s
HTML test (10/17)	7m 28s
HTML test (9/17)	8m 6s
HTML test (1/17)	7m 12s
HTML test (5/17)	7m 50s
HTML test (15/17)	7m 26s
HTML test (17/17)	7m 27s
HTML test (8/17)	7m 15s
HTML test (12/17)	7m 34s
HTML test (13/17)	7m 3s
HTML test (3/17)	7m 38s
HTML test (7/17)	7m 8s
HTML test (6/17)	7m 50s
HTML test (16/17)	7m 42s
HTML test (14/17)	7m 49s
HTML test (11/17)	7m 42s
Merge test snapshots	6s
Merge test results	28s
	2h 28m 43s

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