halkyon_base: a Serverpod module for sign-in, accounts and instance basics

What every Halkyon server has, taken from Halkyon Learn's: anonymous,
GitHub and email-code sign-in with their endpoints, an account's ways
in and its deletion, the pruning of abandoned anonymous people, of
sign-up attempts and of expired codes, and the instance's basics (the
sign-in ways offered, the source link, the minimum app build, where
people's data and its backups are). Endpoints sit under the nickname
`base`. A host configures it in one place before its pod starts: its
name for the mails, its source link, its minimum build, and hooks that
delete its own data with a person.

The tables keep Learn's names, columns and indexes, so a host moving
onto the module migrates nothing but version rows. Server package under
the SSPL, client under the AGPL, as Learn's are.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

packages/halkyon_base_server/test/integration/auth/identified_test.dart

@@ -0,0 +1,26 @@
+import 'package:halkyon_base_server/base.dart';
+import 'package:serverpod_auth_idp_server/core.dart';
+import 'package:test/test.dart';
+
+import '../support/fixtures.dart';
+import '../test_tools/serverpod_test_tools.dart';
+
+void main() {
+  withServerpod('grantIdentified', (sessionBuilder, endpoints) {
+    setUp(() => useBase(sessionBuilder));
+
+    test("reaches the person's existing sessions, not only new ones", () async {
+      final session = sessionBuilder.build();
+      final authUsers = AuthServices.instance.authUsers;
+      final person = (await authUsers.create(session)).id;
+      final device = await signInNewDevice(session, person);
+
+      await grantIdentified(session, person);
+
+      final personAfter = await authUsers.get(session, authUserId: person);
+      expect(personAfter.scopeNames, contains(identified.name));
+      final deviceAfter = await ServerSideSession.db.findById(session, device);
+      expect(deviceAfter!.scopeNames, contains(identified.name));
+    });
+  });
+}