Compute PR diff-ranges during init #10732

Job	Run time
analyze-other (actions)	49s
check-codeql-versions	33s
analyze-other (python)	59s
analyze-javascript (ubuntu-22.04)	4m 27s
analyze-javascript (ubuntu-22.04, linked)	5m 5s
analyze-javascript (ubuntu-24.04)	4m 10s
analyze-javascript (windows-2022, linked)	5m 25s
analyze-javascript (windows-2022)	4m 55s
analyze-javascript (windows-2025, linked)	5m 7s
analyze-javascript (windows-2025)	5m 53s
analyze-javascript (macos-13, linked)	9m 22s
analyze-javascript (ubuntu-24.04, linked)	4m 3s
analyze-javascript (macos-14, linked)	6m 29s
analyze-javascript (macos-15)	8m 39s
analyze-javascript (macos-15, linked)	9m 18s
analyze-javascript (macos-13)	11m 9s
analyze-javascript (macos-14)	5m 46s
	1h 32m 9s

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