Improve N+1 queries tooling for GraphQL types

[Taucher2003]

Our current tooling against N+1 queries uses lookahead_field defined on the BaseObject.

sagittarius/app/graphql/types/base_object.rb

Lines 20 to 34 in 9e00268

	def self.lookahead_field(field, base_scope:, lookaheads: [], conditional_lookaheads: {})
	define_method(field) do |*_args, lookahead:, **_kwargs|
	field_selected = lambda do |f|
	lookahead.selects?(f) ||
	lookahead.selection(:nodes).selects?(f) ||
	lookahead.selection(:edges).selection(:node).selects?(f)
	end
	scope = lookaheads.reduce(base_scope.call(object)) { |acc, f| acc.preload(f) }
	conditional_lookaheads.reduce(scope) do |acc, (f, preload_field)|
	field_selected.call(f) ? acc.preload(preload_field) : acc
	end
	end
	end

With this setup, the configuration for preloads has to be done on every type that includes the type affected by N+1 queries.

This should either be moved to resolvers or some custom tooling that defines the preloads on the affected type directly.