fix(git-tests): Create per-test specific databases

src/ModuleCore/Git/GitManager.cs

@@ -17,6 +17,8 @@ public class GitManager
 	private GitManager(string? databaseName = null)
 	{
 		_registrations = new ConcurrentDictionary<string, InternalGitRegistration>();
+		// Regular usage of this constructor will never pass a database name in. Currently only tests should be hitting
+		// a code path that has a different database name
 		_db = new DatabaseManager(databaseName ?? "git.db");
 
 		InitialiseRegistrations();
@@ -29,6 +31,14 @@ public class GitManager
 	/// </summary>
 	internal static GitManager InternalFreshInstance(string databaseName) => new(databaseName);
 
+	/// <summary>
+	/// Deletes the underlying database file.
+	/// <para>
+	///	Avoid calling this outside of tests.
+	/// </para>
+	/// </summary>
+	internal void DeleteDatabase() => _db.DeleteDatabase();
+
 	/// <summary>
 	/// Creates up any database tables and loads all previously saved git registrations.
 	/// </summary>