feat(ui): add message cache management page and dashboard enhancements

- Introduced MessageCachePage for browsing and managing cached webhook events.
- Enhanced DashboardPage to display runtime stats and message cache information.
- Added new API types for message cache events and system stats.
- Integrated SwaggerPage for API documentation and live request testing.

sql/schema.dbml

@@ -78,8 +78,8 @@ Table whatsapp_account {
   deleted_at timestamp [null]
   
   indexes {
-    (user_id) [name: 'idx_whatsapp_accounts_user_id']
-    (deleted_at) [name: 'idx_whatsapp_accounts_deleted_at']
+    (user_id) [name: 'idx_whatsapp_account_user_id']
+    (deleted_at) [name: 'idx_whatsapp_account_deleted_at']
   }
 }
 
@@ -123,26 +123,27 @@ Table session {
 }
 
 Table message_cache {
-  id varchar(36) [primary key, note: 'UUID']
-  account_id varchar(36) [not null]
-  message_id varchar(255) [unique, not null]
-  chat_id varchar(255) [not null]
-  from_me boolean [not null]
-  timestamp timestamp [not null]
-  message_type varchar(50) [not null, note: 'text, image, video, etc.']
-  content text [not null, note: 'JSON encoded message content']
+  id varchar(128) [primary key]
+  account_id varchar(64) [not null, default: '']
+  event_type varchar(100) [not null]
+  event_data text [not null, note: 'JSON encoded event payload']
+  message_id varchar(255) [not null, default: '']
+  from_number varchar(64) [not null, default: '']
+  to_number varchar(64) [not null, default: '']
+  reason text [not null, default: '']
+  attempts integer [not null, default: 0]
+  timestamp timestamp [not null, default: `now()`]
+  last_attempt timestamp [null]
   created_at timestamp [not null, default: `now()`]
   
   indexes {
-    (account_id) [name: 'idx_message_cache_account_id']
-    (chat_id) [name: 'idx_message_cache_chat_id']
-    (from_me) [name: 'idx_message_cache_from_me']
     (timestamp) [name: 'idx_message_cache_timestamp']
+    (event_type) [name: 'idx_message_cache_event_type']
   }
 }
 
 // Reference documentation
 Ref: api_keys.user_id > users.id [delete: cascade]
 Ref: hooks.user_id > users.id [delete: cascade]
-Ref: whatsapp_accounts.user_id > users.id [delete: cascade]
+Ref: whatsapp_account.user_id > users.id [delete: cascade]
 Ref: sessions.user_id > users.id [delete: cascade]