chore: bump version to 4.2.22

Consolidate dotnet SDK with sync/async implementations and add CI testing.
Move API and portal off pool to prevent failover when cammy is loaded.

clients/c/src/un.c

@@ -6013,7 +6013,7 @@ void print_usage(const char *prog) {
  * ============================================================================ */
 
 const char *unsandbox_version(void) {
-    return "4.2.21";
+    return "4.2.22";
 }
 
 const char *unsandbox_detect_language(const char *filename) {