fix: increase rate limit to 10 per hour

Author: dancer

lib/ai/entitlements.ts

@@ -6,9 +6,9 @@ type Entitlements = {
 
 export const entitlementsByUserType: Record<UserType, Entitlements> = {
   guest: {
-    maxMessagesPerHour: 5,
+    maxMessagesPerHour: 10,
   },
   regular: {
-    maxMessagesPerHour: 5,
+    maxMessagesPerHour: 10,
   },
 };