Merge branch 'determine-desired-sharding-key-feature-category-team_planning' into 'master'

Add desired sharding keys for team_planning

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/148063



Merged-by: Marius Bobin <mbobin@gitlab.com>
Approved-by: charlie ablett <cablett@gitlab.com>
Approved-by: Marius Bobin <mbobin@gitlab.com>
Reviewed-by: charlie ablett <cablett@gitlab.com>
Co-authored-by: Manoj M J <mmj@gitlab.com>

db/docs/epic_user_mentions.yml

@@ -7,4 +7,19 @@ feature_categories:
 description: User mentions in epic descriptions
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/19009
 milestone: '12.6'
-gitlab_schema: gitlab_main
+gitlab_schema: gitlab_main_cell
+allow_cross_joins:
+- gitlab_main_clusterwide
+allow_cross_transactions:
+- gitlab_main_clusterwide
+allow_cross_foreign_keys:
+- gitlab_main_clusterwide
+desired_sharding_key:
+  group_id:
+    references: namespaces
+    backfill_via:
+      parent:
+        foreign_key: epic_id
+        table: epics
+        sharding_key: group_id
+        belongs_to: epic