fix(protocol): point the default telemetry ingest at offlineprotocol.com

The build script baked analytics.offlineprotocol.io, a hostname that does
not exist. Every default build queued its batches and failed each send on
DNS, backing off to 15 minutes and expiring the batches unsent after six
days. The ingest lives at analytics.offlineprotocol.com, the domain every
other reference in the repository already uses; it resolves, serves a
certificate issued for that name, and answers the events route.

Author: bahdotsh

crates/offline-protocol/build.rs

@@ -10,7 +10,7 @@
 
 use std::env;
 
-const DEFAULT_ENDPOINT: &str = "https://analytics.offlineprotocol.io/v1/events";
+const DEFAULT_ENDPOINT: &str = "https://analytics.offlineprotocol.com/v1/events";
 
 fn main() {
     println!("cargo:rerun-if-env-changed=OFFLINE_TELEMETRY_ENDPOINT");