Increase max_depth from 15 to 20 for more headroom

Co-authored-by: Knerio <96529060+Knerio@users.noreply.github.com>

Author: Copilot

app/graphql/sagittarius_schema.rb

@@ -5,7 +5,7 @@ class SagittariusSchema < GraphQL::Schema
   query(Types::QueryType)
 
   default_max_page_size 50
-  max_depth 15
+  max_depth 20
   connections.add(ActiveRecord::Relation, Sagittarius::Graphql::StableConnection)
 
   # For batch-loading (see https://graphql-ruby.org/dataloader/overview.html)

spec/requests/graphql/query/recursive_query_spec.rb

@@ -16,7 +16,7 @@
     let(:query) do
       # Create a query with deep nesting that would cause recursion
       # Organization -> Namespace -> Parent (Organization) -> Namespace -> Parent...
-      nested_levels = 20
+      nested_levels = 25
       nested_query = 'id name'
 
       nested_levels.times do