chore: Update the behavior of Captain resolutions (#10794)

This PR ensures that only conversations from quick conversation channels
are resolved, avoiding resolutions on the email channel (we still need
to improve the UX here). It also updates the FAQ generation logic,
limiting it to conversations that had at least one human interaction.

enterprise/app/services/captain/llm/conversation_faq_service.rb

@@ -8,7 +8,11 @@ class Captain::Llm::ConversationFaqService < Captain::Llm::BaseOpenAiService
     @content = conversation.to_llm_text
   end
 
+  # Generates and deduplicates FAQs from conversation content
+  # Skips processing if there was no human interaction
   def generate_and_deduplicate
+    return [] if no_human_interaction?
+
     new_faqs = generate
     return [] if new_faqs.empty?
 
@@ -21,6 +25,10 @@ class Captain::Llm::ConversationFaqService < Captain::Llm::BaseOpenAiService
 
   attr_reader :content, :conversation, :assistant
 
+  def no_human_interaction?
+    conversation.first_reply_created_at.nil?
+  end
+
   def find_and_separate_duplicates(faqs)
     duplicate_faqs = []
     unique_faqs = []