chore(frontend): improve comment formatting, fix minor code inconsistencies, and enhance SQLite worker initialization

- Standardized comment formatting across SQLite worker and local DB modules for clarity and consistency.
- Fixed minor typos in comments and removed redundant placeholders.
- Refined SQLite Web Worker initialization logic by aligning method implementations with clean code practices.
- Updated Kotlin code in DB driver factories to handle exceptions concisely and improve robustness during schema initialization.

frontend/core/sync/src/commonMain/kotlin/at/mocode/frontend/core/sync/SyncCore.kt

@@ -12,9 +12,7 @@ import io.ktor.client.request.parameter
 interface SyncableRepository<T : Syncable> {
   /**
    * Cursor für Delta-Sync.
-   *
    * Konvention: UUIDv7 als String (Backend kann `>` vergleichen) oder ein kompatibler Cursor.
-   *
    * @return letzter bekannter Cursor lokal oder `null`, wenn noch keine Daten existieren.
    */
   suspend fun getLatestSince(): String?