M3 Integration fixes

Modules/M3/Helpers/M3Auth.php

@@ -5,7 +5,7 @@ if (! function_exists('m3_user')) {
      * Return the current Core username in the format expected by the legacy M3 data.
      * M3 previously depended on PHP Basic Auth and read PHP_AUTH_USER directly.
      */
-    function m3_user(): string
+    function m3User(): string
     {
         $user = auth()->user();
 
@@ -29,7 +29,7 @@ if (! function_exists('m3_legacy_password')) {
      * Passwords are intentionally unavailable in Core. PostgreSQL access uses
      * Laravel's configured connection and never reuses a user's login password.
      */
-    function m3_legacy_password(): string
+    function m3LegacyPassword(): string
     {
         return '';
     }