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-server/migration/src/lib.rs

@@ -29,6 +29,7 @@ mod m20260413_000026_create_audit_logs;
 mod m20260414_000027_fix_unique_indexes_soft_delete;
 mod m20260414_000028_add_standard_fields_to_tokens;
 mod m20260414_000029_add_standard_fields_to_process_variables;
+mod m20260415_000030_add_version_to_message_tables;
 
 pub struct Migrator;
 
@@ -65,6 +66,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260414_000027_fix_unique_indexes_soft_delete::Migration),
             Box::new(m20260414_000028_add_standard_fields_to_tokens::Migration),
             Box::new(m20260414_000029_add_standard_fields_to_process_variables::Migration),
+            Box::new(m20260415_000030_add_version_to_message_tables::Migration),
         ]
     }
 }