Fix: clean up SQLite WAL/SHM sidecars in ApiFactory.Dispose

backend.tests/ApiFactory.cs

@@ -1,10 +1,7 @@
-using System.IO;
-using backend.Data;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Mvc.Testing;
-using Microsoft.EntityFrameworkCore;
+using Microsoft.Data.Sqlite;
 using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.DependencyInjection;
 
 namespace backend.tests;
 
@@ -27,7 +24,11 @@ public class ApiFactory : WebApplicationFactory<Program>
     protected override void Dispose(bool disposing)
     {
         base.Dispose(disposing);
-        if (File.Exists(_dbPath))
-            File.Delete(_dbPath);
+        SqliteConnection.ClearAllPools();
+        foreach (var suffix in new[] { "", "-shm", "-wal", "-journal" })
+        {
+            var p = _dbPath + suffix;
+            try { if (File.Exists(p)) File.Delete(p); } catch { /* best effort */ }
+        }
     }
 }