fix(message): resolve Phase 5-6 audit findings

- Add missing version column to all message tables (migration + entities)
- Replace N+1 mark_all_read loop with single batch UPDATE query
- Fix NotificationList infinite re-render (extract queryFilter to stable ref)
- Fix NotificationPreferences dynamic import and remove unused Dayjs type
- Add Semaphore (max 8) to event listener for backpressure control
- Add /docs/openapi.json endpoint for API documentation
- Add permission check to unread_count handler
- Add version: Set(1) to all ActiveModel inserts

crates/erp-message/src/entity/message_template.rs

@@ -19,6 +19,7 @@ pub struct Model {
     pub updated_by: Uuid,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub deleted_at: Option<DateTimeUtc>,
+    pub version: i32,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]