feat: Single-port deployment with improved error handling and SvelteKit static build

- Frontend now uses @sveltejs/adapter-static for production builds
- Backend serves both API and static files from single port (originally port 3000)
- Removed all throw statements from services to avoid Elysia prototype errors
- Fixed favicon serving and SvelteKit assets path handling
- Added ecosystem.config.js for PM2 process management
- Comprehensive deployment documentation (PM2 + HAProxy)
- Updated README with single-port architecture
- Created start.sh script for easy production start

src/backend/services/awards.service.js

@@ -546,7 +546,7 @@ export async function getAwardProgressDetails(userId, awardId) {
   const award = definitions.find((def) => def.id === awardId);
 
   if (!award) {
-    throw new Error('Award not found');
+    return null;
   }
 
   // Calculate progress
@@ -572,7 +572,7 @@ export async function getAwardEntityBreakdown(userId, awardId) {
   const award = definitions.find((def) => def.id === awardId);
 
   if (!award) {
-    throw new Error('Award not found');
+    return null;
   }
 
   let { rules } = award;