feat: add 3 new error entries (runner-environment x3)

[htekdev]

New Error Entries — Strategy 4 Round 208 (Runner Image Updates)

Added entries

ID	File	Category	Issue
runner-environment-428	macos-15-26-python-asyncio-subprocess-spawn-22x-slowdown.yml	runner-environment	runner-images#14181
runner-environment-429	setup-dotnet-v530-global-json-rollforward-substring-error.yml	runner-environment	setup-dotnet#739, #740
runner-environment-430	windows-11-arm-az-module-12-to-15-three-major-jump.yml	runner-environment	runner-images#14207

re-428: macOS-15/26 Python asyncio+multiprocessing 22x slowdown since image 20260527.0100.1 (runner-images#14181)

re-429: setup-dotnet v5.3.0 global.json rollForward breaks with TypeError: Cannot read properties of undefined (reading 'substring') (setup-dotnet#739, #740)

re-430: windows-11-arm Az 12.5.0→15.6.1 three-major-version jump in one update; all other runners went 14.6.0→15.6.1 (runner-images#14207)

[htekdev]

Closing: branch based on pre-round-198 base, conflicts with main. Entries re-428/429/430 will be re-added in next PR from current main.