refactor(bisaya-course): enhance pedagogy logic for German lessons

- Updated the `getGermanForBisayaLessonPedagogy` function to include lesson titles for improved didactic mode determination, specifically adding support for 'contrast_training'.
- Modified multiple scripts to utilize the updated pedagogy function, ensuring consistent application of the new logic across various course phases.
- Enhanced the VocabService to recognize and handle 'contrast_training' as a didactic mode, improving lesson management and user experience.
- Updated UI components to reflect the new didactic mode, ensuring clarity in lesson presentation.

backend/scripts/extend-german-for-bisaya-course-phase3.js

@@ -37,7 +37,7 @@ async function extendGermanForBisayaPhase3() {
       if (existing) continue;
 
       const didactics = GERMAN_FOR_BISAYA_PHASE3_DIDACTICS[lessonData.title] || {};
-      const pedagogy = getGermanForBisayaLessonPedagogy(lessonData.num, lessonData.type);
+      const pedagogy = getGermanForBisayaLessonPedagogy(lessonData.num, lessonData.type, lessonData.title);
 
       await VocabCourseLesson.create({
         courseId: course.id,