Fix macOS build: add fail-fast: false to prevent job cancellation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: hydropix

.github/workflows/build-macos.yml

@@ -12,6 +12,7 @@ permissions:
 jobs:
   build-macos:
     strategy:
+      fail-fast: false
       matrix:
         include:
           - os: macos-13