Fix viewer cant view article (#664)

* Create 20240426101308_ALTER_select_changes_policy.sql

* Update 20240426101308_ALTER_select_changes_policy.sql

Author: J43fura

supabase/migrations/20240426101308_ALTER_select_changes_policy.sql

@@ -0,0 +1,12 @@
+-- Alter select_changes_policy to allow selects to changes by owners, editors, reviewers and viewers.
+ALTER POLICY select_changes_policy
+  ON changes
+  TO authenticated
+  USING (
+      -- Check if the authenticated user has appropriate permissions
+      auth.uid() IN (
+        SELECT user_id
+        FROM private.get_all_permissions_by_article_id(article_id) p
+        WHERE p.role IN ('owner', 'editor', 'reviewer','viewer')
+      )
+  );