V13-FE-011: finalize search list layout slice

docs/Design/kbx-foundation-v36/backend/Shared/Excel/PurgeExpiredImportsJob.cs

@@ -0,0 +1,21 @@
+using Dapper;
+using Npgsql;
+
+namespace Shared.Excel;
+
+/// <summary>
+/// Run daily from Hangfire. The default reference retention is 14 days.
+/// Audit/domain records survive; raw uploaded files and staging rows do not.
+/// </summary>
+public sealed class PurgeExpiredImportsJob(NpgsqlDataSource dataSource)
+{
+    public async Task<int> RunAsync(CancellationToken ct)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(ct);
+        return await connection.ExecuteAsync(new CommandDefinition("""
+            delete from kbx.import_sessions
+             where expires_at < now()
+               and status in ('completed','partially-completed','failed','cancelled');
+            """, cancellationToken: ct));
+    }
+}