fix(reflectors): merge missing country metadata without startup conflicts

src/main.rs

@@ -196,11 +196,10 @@ fn insert_reflector(
     endpoint: SocketAddr,
     definition: ReflectorDefinition,
 ) -> anyhow::Result<()> {
-    if let Some(existing) = reflectors.get(&endpoint) {
+    if let Some(existing) = reflectors.get_mut(&endpoint) {
         let same_country = match (&existing.country, &definition.country) {
             (Some(a), Some(b)) => a.eq_ignore_ascii_case(b),
-            (None, None) => true,
-            _ => false,
+            _ => true,
         };
         let same_protocols = existing
             .protocols
@@ -217,6 +216,9 @@ fn insert_reflector(
         {
             anyhow::bail!("conflicting reflector definitions for resolved endpoint {endpoint}");
         }
+        if existing.country.is_none() {
+            existing.country = definition.country;
+        }
     } else {
         reflectors.insert(endpoint, definition);
     }