refactor(form_configurable): simplify YAML form config loading with symbol keys

- Remove namespace usage and use class name only for YAML file lookup
- Load form config YAML and directly map form fields with symbol keys
- Remove unnecessary deep_symbolize_keys call on entire YAML content
- Add comments clarifying the changes in YAML key handling

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>

Author: stefan-burke

app/models/concerns/form_configurable.rb

@@ -15,10 +15,15 @@ def form_fields(user: nil)
 
     sig { returns(T::Array[T::Hash[Symbol, T.untyped]]) }
     def load_form_config_from_yaml
+      # Remove namespace and use just the class name
       file_name = name.demodulize.underscore
       config_path = Rails.root.join("config/forms/#{file_name}.yml")
       yaml_content = YAML.load_file(config_path)
-      yaml_content.deep_symbolize_keys!
+      yaml_content["form_fields"].map do |fieldset|
+        fieldset = fieldset.deep_symbolize_keys
+        # Fields now have symbols directly in YAML, no conversion needed
+        fieldset
+      end
     end
   end
 end