[TASK] Add GIT URI to Slack webhook

[garvinhicking]

Currently only a composer key is emitted in the slack hook. However, a URI to the actua GIT repository would be helpful, because:

1.) A composer package may not have been released (yet) of an extension 2.) A TER package may not have been released (yet) of an extension 3.) The composer key and the Github Repo vendor/name may differ

This commit is unverified. I am crossing my fingers that $jar->getRepositoryUrl() really holds what I expect it to. :-D

[CybotTM]

The failing test is a fixture gap, not your change. SlackServiceTest builds a DocumentationJar without a repository URL, and $repositoryUrl is a non-nullable typed property, so the first read throws. One line in tests/Functional/Service/SlackServiceTest.php fixes it:

         $jar->setPackageName('acme/my-extension');
+        $jar->setRepositoryUrl('https://github.com/acme/my-extension.git');
         $jar->setTypeShort('p');

Plus an assertion, so the new link is covered:

self::assertStringContainsString('<https://github.com/acme/my-extension.git|', $attachment['text']);

Assisted by claude-code:claude-opus-5 — Session

[garvinhicking]

@CybotTM Thanks a lot! I implemented your suggestion, sounds sane to me.

@andreaskienast Can you rerun the test?