perf: upsert fast path #3288

Job	Run time
Build	5m 19s
Build samples	30s
Verify build-browser (macos-26)	43s
Verify build-browser (ubuntu-latest)	53s
Verify build-browser (windows-latest)	3m 30s
Print commit stats	1m 5s
Type definitions test	2m 13s
Static code analysis	4m 13s
Unit test	3m 13s
HTML test (2/17)	7m 32s
HTML test (1/17)	6m 52s
HTML test (13/17)	7m 25s
HTML test (15/17)	7m 43s
HTML test (3/17)	7m 37s
HTML test (6/17)	7m 52s
HTML test (5/17)	7m 54s
HTML test (7/17)	7m 11s
HTML test (9/17)	8m 25s
HTML test (10/17)	7m 21s
HTML test (12/17)	7m 31s
HTML test (17/17)	7m 38s
HTML test (8/17)	7m 21s
HTML test (11/17)	7m 40s
HTML test (14/17)	8m 0s
HTML test (4/17)	7m 38s
HTML test (16/17)	7m 54s
Merge test results	32s
Merge test snapshots	5s
Verify build-browser (macos-26)	43s
Print commit stats	1m 5s
Verify build-browser (windows-latest)	3m 30s
Verify build-browser (ubuntu-latest)	53s
HTML test (3/17)	7m 37s
HTML test (4/17)	7m 38s
Build	5m 19s
HTML test (1/17)	6m 52s
HTML test (5/17)	7m 54s
Type definitions test	2m 13s
Static code analysis	4m 13s
HTML test (8/17)	7m 21s
HTML test (7/17)	7m 11s
HTML test (10/17)	7m 21s
Unit test	3m 13s
HTML test (15/17)	7m 43s
HTML test (2/17)	7m 44s
HTML test (13/17)	7m 25s
HTML test (9/17)	8m 25s
HTML test (6/17)	7m 52s
HTML test (16/17)	7m 54s
HTML test (17/17)	7m 38s
HTML test (11/17)	7m 40s
HTML test (14/17)	8m 0s
HTML test (12/17)	7m 31s
Build samples	30s
Merge test results	26s
Merge test snapshots	3s
	5h 3m 44s

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