Add cache for embed in queries

app/models/card/searchable.rb

@@ -8,8 +8,8 @@ module Card::Searchable
 
     scope :mentioning, ->(query) do
       if query = sanitize_query_syntax(query)
-        cards = Card.search(query).select(:id).to_sql
-        comments = Comment.search(query).select(:id).to_sql
+        cards = Card.search_similar(query).select(:id).to_sql
+        comments = Comment.search_similar(query).select(:id).to_sql
 
         left_joins(:comments).where("cards.id in (#{cards}) or comments.id in (#{comments})").distinct
       else

app/models/concerns/searchable.rb

@@ -21,7 +21,7 @@ module Searchable
 
       scope :search, ->(query) { joins("join #{using} idx on #{table_name}.id = idx.rowid").where("idx.#{as} match ?", query) }
       scope :search_similar, ->(query) do
-        query_embedding = RubyLLM.embed(query)
+        query_embedding = Rails.cache.fetch("llm:#{query}") { RubyLLM.embed(query) }
         joins(:search_embedding)
           .where("embedding MATCH ? AND k = ?", query_embedding.vectors.to_json, 20)
           .order(:distance)