Fix an issue where paths could bleed across repos in Owners

Summary:
Ref T8320. I missed this a while ago and then it came to me in a dream.

Only consider paths in the same repo when looking at ownership.

(I think this is rarely reachable in practice.)

Test Plan: Verified that files and commits still listed ownership properly.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T8320

Differential Revision: https://secure.phabricator.com/D14022

src/applications/owners/query/PhabricatorOwnersPackageQuery.php

@@ -372,6 +372,11 @@ final class PhabricatorOwnersPackageQuery
       $include = false;
 
       foreach ($package->getPaths() as $package_path) {
+        if ($package_path->getRepositoryPHID() != $repository_phid) {
+          // If this path is for some other repository, skip it.
+          continue;
+        }
+
         $strength = $package_path->getPathMatchStrength($path);
         if ($strength > $best_match) {
           $best_match = $strength;