Register oracle_enhanced adapter for ActiveRecord 8.0 in specs

ActiveRecord 8.0 requires adapters to be explicitly registered.
The oracle_enhanced adapter only auto-registers via Railtie when
Rails is present. Register it manually in spec_helper.rb.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

spec/spec_helper.rb

@@ -20,6 +20,14 @@
 
 unless ENV["NO_ACTIVERECORD"]
   require "active_record"
+  require "active_record/connection_adapters/oracle_enhanced_adapter"
+  if ActiveRecord::ConnectionAdapters.respond_to?(:register)
+    ActiveRecord::ConnectionAdapters.register(
+      "oracle_enhanced",
+      "ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter",
+      "active_record/connection_adapters/oracle_enhanced_adapter"
+    )
+  end
 else
   puts "Without ActiveRecord"
 end