Xcode cache daemon now respects the TUIST_CACHE_ENDPOINT override

This fix ensures that the Xcode compilation cache (CAS) daemon receives the TUIST_CACHE_ENDPOINT environment variable when it is set. Previously, the daemon was launched as a launchd agent that did not inherit the caller’s environment, so it used the public cache endpoint even when Tuist had been directed to a private network cache. With this change, the daemon now routes to the same cache endpoint as the rest of the CLI, which can reduce round-trip latency and improve full-compile performance in environments that rely on a dispatched cache endpoint.