🔧 Add configuration to preserve pre-existing behavior of 'activerecor…

…d-oracle_enhanced-adapter'

oracle-enhanced v6.00 changes the default sequence start value from 10,000 to 1:
  Release Notes: https://github.com/rsim/oracle-enhanced/blob/v6.0.6/History.md#600--2019-08-17
  Related PR: rsim/oracle-enhanced#1636

Preserve the original default value of 10,000

config/initializers/oracle.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+ActiveSupport.on_load(:active_record) do
+  ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter.class_eval do
+    # oracle-enhanced v6.00 changes the default sequence start value from 10,000 to 1:
+    #   Release Notes: https://github.com/rsim/oracle-enhanced/blob/v6.0.6/History.md#600--2019-08-17
+    #   Related PR: https://github.com/rsim/oracle-enhanced/pull/1636
+    #
+    # Preserve the original default value of 10,000
+    self.default_sequence_start_value = 10_000
+  end
+end