Add RAG semantic search and proactive event notifications

Implement hybrid knowledge search using Cloudflare Vectorize + Workers AI
embeddings (bge-base-en-v1.5, 768d) merged with existing D1 LIKE queries,
with graceful degradation when Vectorize is unavailable. Add admin API
endpoints for batch/single article indexing.

Add 4 proactive notification cron jobs: server status changes, deposit
confirmation/rejection alerts, pending payment reminders (1h+), and bank
deposit matching notifications — all with DB-column-based deduplication.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/index.ts

@@ -124,6 +124,10 @@ export default {
       archiveOldConversations,
       cleanupStaleOrders,
       monitoringCheck,
+      notifyServerStatusChanges,
+      notifyTransactionStatusChanges,
+      sendPaymentReminders,
+      notifyBankMatches,
     } = await import('./services/cron-jobs');
 
     try {
@@ -135,14 +139,18 @@ export default {
           await cleanupExpiredSessions(env);
           break;
 
-        // Every 5 minutes: stale session/order cleanup
+        // Every 5 minutes: stale cleanup + proactive notifications
         case '*/5 * * * *':
           await cleanupStaleOrders(env);
+          await notifyServerStatusChanges(env);
+          await notifyTransactionStatusChanges(env);
+          await notifyBankMatches(env);
           break;
 
-        // Every hour: monitoring checks
+        // Every hour: monitoring checks + payment reminders
         case '0 * * * *':
           await monitoringCheck(env);
+          await sendPaymentReminders(env);
           break;
 
         default: