fix: critical boolean compatibility for PostgreSQL/SQLite

Fixed boolean value handling differences between databases:
- SQLite stores booleans as 0/1, PostgreSQL as true/false
- Add formatBoolean() calls to critical queries that were failing

Files fixed:
- adminEvents.js: Fixed status filters and archive queries
- adminDashboard.js: Fixed active/archived event counts
- expirationChecker.js: Fixed expiration checking queries
- dbCompat.js: Updated to avoid circular dependency

Added migration 024 to:
- Enable foreign keys for SQLite (PRAGMA foreign_keys = ON)
- Document boolean compatibility requirements

This fixes queries returning 0 results in SQLite when checking
boolean columns like is_active, is_archived. Critical for
proper event management and expiration handling.

Note: 23 more boolean comparisons remain to be fixed in other files.

backend/src/routes/adminEvents.js

@@ -11,6 +11,7 @@ const { archiveEvent } = require('../services/archiveService');
 const { escapeLikePattern } = require('../utils/sqlSecurity');
 const { formatDate } = require('../utils/dateFormatter');
 const { validatePasswordInContext, getBcryptRounds } = require('../utils/passwordValidation');
+const { formatBoolean } = require('../utils/dbCompat');
 
 // Create new event
 router.post('/', adminAuth, [
@@ -183,17 +184,17 @@ router.get('/', adminAuth, async (req, res) => {
 
     // Apply status filter
     if (status === 'active') {
-      query = query.where('is_active', true).where('is_archived', false);
+      query = query.where('is_active', formatBoolean(true)).where('is_archived', formatBoolean(false));
     } else if (status === 'archived') {
-      query = query.where('is_archived', true);
+      query = query.where('is_archived', formatBoolean(true));
     } else if (status === 'inactive') {
-      query = query.where('is_active', false).where('is_archived', false);
+      query = query.where('is_active', formatBoolean(false)).where('is_archived', formatBoolean(false));
     } else if (status === 'expiring') {
       const sevenDaysFromNow = new Date();
       sevenDaysFromNow.setDate(sevenDaysFromNow.getDate() + 7);
       query = query
-        .where('is_active', true)
-        .where('is_archived', false)
+        .where('is_active', formatBoolean(true))
+        .where('is_archived', formatBoolean(false))
         .where('expires_at', '<=', sevenDaysFromNow.toISOString())
         .where('expires_at', '>', new Date().toISOString());
     }
@@ -554,7 +555,7 @@ router.post('/bulk-archive', adminAuth, [
     // Get all events to archive
     const events = await db('events')
       .whereIn('id', eventIds)
-      .where('is_archived', false);
+      .where('is_archived', formatBoolean(false));
 
     if (events.length === 0) {
       return res.status(400).json({ error: 'No valid events found to archive' });