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/services/expirationChecker.js

@@ -4,6 +4,7 @@ const { archiveEvent } = require('./archiveService');
 const { queueEmail } = require('./emailProcessor');
 const logger = require('../utils/logger');
 const { formatDate } = require('../utils/dateFormatter');
+const { formatBoolean } = require('../utils/dbCompat');
 
 function startExpirationChecker() {
   // Check every hour for expired events and warnings
@@ -21,8 +22,8 @@ async function checkExpirations() {
     
     // Check for events needing warning emails
     const eventsNeedingWarning = await db('events')
-      .where('is_active', true)
-      .where('is_archived', false)
+      .where('is_active', formatBoolean(true))
+      .where('is_archived', formatBoolean(false))
       .where('expires_at', '<=', warningDate)
       .where('expires_at', '>', now);
     
@@ -40,8 +41,8 @@ async function checkExpirations() {
     
     // Check for expired events
     const expiredEvents = await db('events')
-      .where('is_active', true)
-      .where('is_archived', false)
+      .where('is_active', formatBoolean(true))
+      .where('is_archived', formatBoolean(false))
       .where('expires_at', '<=', now);
     
     for (const event of expiredEvents) {