Fix missing license on new file.

crates/db/src/tuplebox/tuples/slot_ptr.rs

@@ -1,3 +1,17 @@
+// Copyright (C) 2024 Ryan Daum <[email protected]>
+//
+// This program is free software: you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free Software
+// Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program. If not, see <https://www.gnu.org/licenses/>.
+//
+
 use crate::tuplebox::tuples::{SlotBox, TupleId};
 use moor_values::util::slice_ref::ByteSource;
 use std::hash::Hash;