fix(openflare): serialize access log snowflake IDs as strings

- Return AccessLogView.id as string to avoid JS Number precision loss
- Store OpenFlareAccessLog IDs as uint64 with json id,string
- Update frontend AccessLogItem.id type to string

frontend/lib/services/openflare/types.ts

@@ -523,7 +523,7 @@ export interface AccessLogFilters {
 }
 
 export interface AccessLogItem {
-  id: number;
+  id: string;
   node_id: string;
   node_name: string;
   logged_at: string;