relabel: Promoteur·ice ULB → Promoteur·ice université in all UI labels

Pure label change across 6 template/controller files — no DB schema change.
Migration 043 added to track the change.

app/templates/public/tfe.php

@@ -133,7 +133,7 @@
 
                 <?php if (!empty($promoteursUlb)): ?>
                 <p class="tfe-meta-item">
-                    <span class="tfe-meta-label">Promoteur·ice ULB :</span>
+                    <span class="tfe-meta-label">Promoteur·ice université :</span>
                     <?php
                     $links = array_map(
                         fn($n) => '<a href="/search?query=' . urlencode($n) . '">' . htmlspecialchars($n) . '</a>',