fix(ci): Add set -e to link-packages for proper error propagation

Without set -e, if an individual link_package call fails, the script
continues silently. Only the last call's exit code determined the step
result — masking earlier failures.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.woodpecker.yml

@@ -280,6 +280,7 @@ steps:
       - echo "Waiting 10 seconds for packages to be indexed in registry..."
       - sleep 10
       - |
+        set -e
         link_package() {
           PKG="$$1"
           echo "Linking $$PKG..."