🐛 Fix parser field visibility on importer edit form (#1007)

* 🐛 Fix parser field visibility on importer edit form

The form initialization check was previously only looking for new forms
(#new_importer), causing the JavaScript field visibility logic to be
skipped entirely on edit pages. This meant parser-specific fields weren't
being properly hidden/shown when editing existing importers.

Added .edit_importer to the form check to ensure the field visibility
logic runs on both new and edit forms.

* Pin concurrent-ruby to v1.3.4 to maintain logger dependency

- Addresses logger dependency removal in concurrent-ruby v1.3.5
- Ensures compatibility with Rails versions before 7.1

---------

Co-authored-by: Shana Moore <shana@scientist.com>

Gemfile

@@ -15,6 +15,7 @@ gemspec
 gem 'blacklight'
 gem 'bootstrap-sass', '~> 3.4.1'
 gem 'coderay'
+gem 'concurrent-ruby', '1.3.4'
 gem 'factory_bot_rails'
 
 # Conditional logic based on Ruby version

app/assets/javascripts/bulkrax/importers.js.erb

@@ -2,7 +2,7 @@
 // All this logic will automatically be available in application.js.
 
 function prepBulkrax(event) {
-  if($('form#new_importer').length < 1) {
+  if($('form#new_importer, form.edit_importer').length < 1) {
     return true;
   }