feat(falukant): enhance product pricing and nobility advancement features

- Updated the `getAllProductPricesInRegion` method in `FalukantService` to accept additional parameters for network worth and branch ID, improving pricing calculations based on user branches.
- Enhanced the nobility advancement logic in `NobilityView` to display unmet requirements clearly, providing users with better feedback on advancement conditions.
- Refactored the revenue calculation in `ProductionSection` to utilize a cached product prices object, optimizing performance and reducing redundant API calls.
- Updated localization files to include new translations for attack sources across multiple languages, enhancing the user experience for diverse audiences.
- Removed obsolete C++ worker references and streamlined the retention logic for production logs, ensuring efficient data management.

.cursor/rules/legacy-cpp-workers.mdc

@@ -0,0 +1,9 @@
+---
+description: C++-Worker unter src/ sind obsolet — nicht erweitern oder als Quelle für Spiellogik nutzen
+alwaysApply: true
+---
+
+# Legacy C++ (`src/`)
+
+- Verzeichnis **`src/`** (C++-Worker, WebSocket-Server): **obsolet**. Keine neuen Features, keine fachlichen Fixes dort planen oder umsetzen, sofern der Nutzer nicht ausdrücklich etwas anderes verlangt.
+- Falukant-Hintergrundlogik: **Backend** (`backend/`), **externer Daemon**, **Frontend** — siehe `docs/LEGACY_CPP_WORKERS.md`.