feat(falukant): update production counting logic and enhance localization

- Modified the production counting logic in FalukantService to count each completed production directly from the falukant_log.production table, simplifying the query structure.
- Added a new localization entry for "scoreHowToRaise" in Cebuano, German, English, Spanish, and French to provide users with clear guidance on how to improve their score through various factors.
- Updated the OverviewView component to display the new score improvement information, enhancing user experience and understanding of scoring dynamics.

frontend/src/views/falukant/OverviewView.vue

@@ -119,6 +119,9 @@
             <p class="certificate-panel__hint">
                 {{ certificateProgressHint }}
             </p>
+            <p class="certificate-panel__howto">
+                {{ $t('falukant.overview.certificate.scoreHowToRaise') }}
+            </p>
 
             <div class="certificate-panel__grid">
                 <article class="certificate-panel__block">
@@ -917,6 +920,12 @@ export default {
     color: var(--color-text-secondary);
 }
 
+.certificate-panel__howto {
+    margin: -8px 0 16px;
+    color: var(--color-text-secondary);
+    font-size: 0.92rem;
+}
+
 .certificate-panel__productions-since {
     margin: 6px 0 0;
     font-size: 0.85rem;