Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/services/mailbox/conversation_finder.rb

@@ -0,0 +1,29 @@
+class Mailbox::ConversationFinder
+  DEFAULT_STRATEGIES = [
+    Mailbox::ConversationFinderStrategies::ReceiverUuidStrategy,
+    Mailbox::ConversationFinderStrategies::InReplyToStrategy,
+    Mailbox::ConversationFinderStrategies::ReferencesStrategy,
+    Mailbox::ConversationFinderStrategies::NewConversationStrategy
+  ].freeze
+
+  def initialize(mail, strategies: DEFAULT_STRATEGIES)
+    @mail = mail
+    @strategies = strategies
+  end
+
+  def find
+    @strategies.each do |strategy_class|
+      conversation = strategy_class.new(@mail).find
+
+      next unless conversation
+
+      strategy_name = strategy_class.name.demodulize.underscore
+      Rails.logger.info "Conversation found via #{strategy_name} strategy"
+      return conversation
+    end
+
+    # Should not reach here if NewConversationStrategy is in the chain
+    Rails.logger.error 'No conversation found via any strategy (NewConversationStrategy missing?)'
+    nil
+  end
+end