Solin Streaks

Fixes both issues raised in the plugin review (MMR-45):

• Required activity-module events. The module now defines and triggers course_module_viewed (from the inline course-page render and from the Moodle App view) and course_module_instance_list_viewed (from index.php).


• File boilerplate headers. All four Mustache templates now carry the GPL "This file is part of Moodle" block plus explicit @copyright and @license tags.

Also in this release:

• One Solin Streaks activity per course is now enforced on every creation path (activity form validation, direct add, duplicate and import). A second instance in the same course produced a permanently empty widget, because only one instance received credit. Instance resolution is now deterministic (oldest wins), and a restore that would introduce a duplicate logs a warning in the restore log instead of silently taking over crediting.

Tested green on Moodle 4.5, 5.0, 5.1 and 5.2 across PHP 8.1-8.3 with both PostgreSQL and MariaDB: 80 PHPUnit tests (306 assertions) and 5 Behat scenarios.