Replace all mock/placeholder data with real data systems

- Added getUserCount() method to Keycloak admin for real user statistics
- Replaced hardcoded userCount (25) with live Keycloak data in admin stats
- Fixed board meeting API to query real events, removed Jan 15 2025 fallback
- Updated board stats to count real events instead of hardcoded 3
- Created member-tiers service for proper tier determination
- Created dues-calculator service for accurate dues tracking
- Updated auth callback to use member-tiers service
- Updated overdue-count API to use dues-calculator
- Added data quality tracking with confidence levels
- Added proper error handling - returns null/0 instead of fake data
- Included source tracking for all data (live/calculated/fallback)

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

server/api/admin/stats.get.ts

@@ -1,5 +1,5 @@
 export default defineEventHandler(async (event) => {
-  console.log('📊 Simple admin stats requested at:', new Date().toISOString());
+  console.log('📊 Admin stats requested at:', new Date().toISOString());
   
   try {
     // Check if user is admin
@@ -17,17 +17,34 @@ export default defineEventHandler(async (event) => {
     
     console.log('✅ Admin access verified for user:', session.user.email);
     
-    // Return simple user-focused stats without system metrics
+    // Get real user count from Keycloak
+    let userCount = 0;
+    try {
+      const { createKeycloakAdminClient } = await import('~/server/utils/keycloak-admin');
+      const keycloakAdmin = createKeycloakAdminClient();
+      userCount = await keycloakAdmin.getUserCount(false); // Exclude service accounts
+      console.log('✅ Retrieved real user count from Keycloak:', userCount);
+    } catch (keycloakError: any) {
+      console.error('⚠️ Failed to get user count from Keycloak:', keycloakError);
+      // Instead of returning mock data, return 0 or null to indicate data unavailable
+      console.log('⚠️ User count unavailable, returning 0');
+      userCount = 0;
+    }
+    
+    // Return stats with real data
     const stats = {
-      // Simple user count (mock data for now - would come from Keycloak API)
-      userCount: 25,
+      // Real user count from Keycloak (0 if unavailable)
+      userCount: userCount,
       
-      // Basic portal health without system metrics
+      // Basic portal health
       portalStatus: 'online',
-      lastUpdate: new Date().toISOString()
+      lastUpdate: new Date().toISOString(),
+      
+      // Add flag to indicate if data is from cache or live
+      dataSource: userCount > 0 ? 'live' : 'unavailable'
     };
     
-    console.log('✅ Simple admin stats retrieved successfully');
+    console.log('✅ Admin stats retrieved successfully:', stats);
     return stats;
     
   } catch (error: any) {