chore: force GitHub cache refresh for v1.1.0 README

GitHub CDN was serving cached v1.0.0 README content with old performance numbers.
This commit forces cache invalidation to show updated v1.1.0 content with verified benchmarks.

Author: codenimja

.github/CACHE_REFRESH.md

@@ -0,0 +1,6 @@
+# Cache Refresh
+
+This file exists to force GitHub's CDN cache to refresh the README.md content.
+
+Created: 2025-11-02
+Reason: GitHub was serving cached v1.0.0 README content despite v1.1.0 being live