perf(core,mentions): limit mentionedBy post relation results (#3780)

* perf(core,mentions): limit `mentionedBy` post relation results

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* Apply fixes from StyleCI

* chore: use a static property to allow customization

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* chore: use a static property to allow customization

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* chore: include count in show post endpoint

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* chore: consistent locale key format

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* chore: forgot to delete `FilterVisiblePosts`

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* test: `mentionedByCount` must not include invisible posts to actor

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: visibility scoping on `mentionedByCount`

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* fix: `loadAggregates` conflicts with visibility scopers

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

* Apply fixes from StyleCI

* chore: phpstan

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>

---------

Signed-off-by: Sami Mazouz <sychocouldy@gmail.com>
Co-authored-by: StyleCI Bot <bot@styleci.io>

extensions/mentions/locale/en.yml

@@ -25,6 +25,11 @@ flarum-mentions:
       mention_tooltip: Mention a user, group or post
       reply_to_post_text: "Reply to #{number}"
 
+    # These translations are used by the mentioned by modal dialog.
+    mentioned_by:
+      title: Replies to this post
+      load_more_button: => core.ref.load_more
+
     # These translations are used by the Notifications dropdown, a.k.a. "the bell".
     notifications:
       others_text: => core.ref.some_others
@@ -34,6 +39,7 @@ flarum-mentions:
 
     # These translations are displayed beneath individual posts.
     post:
+      mentioned_by_more_text: "{count} more replies."
       mentioned_by_self_text: "{users} replied to this."  # Can be pluralized to agree with the number of users!
       mentioned_by_text: "{users} replied to this."       # Can be pluralized to agree with the number of users!
       others_text: => core.ref.some_others