chore: Skip returning vectors to lower memory use

lib/medicode/feedback.ex

@@ -77,7 +77,8 @@ defmodule Medicode.Feedback do
       inner_join: v in assoc(f, :code_vector),
       where:
         f.user_id == ^user_id and f.code_vector_id == ^code_vector_id and
-          f.text == ^text
+          f.text == ^text,
+      select: [:id, :response]
     )
   end
 

lib/medicode/transcriptions.ex

@@ -139,11 +139,20 @@ defmodule Medicode.Transcriptions do
 
   """
   def list_transcription_chunk_code_vectors(chunk_id) do
+    code_vector_query =
+      from(
+        c in Medicode.Coding.CodeVector,
+        join: v in TranscriptionChunkCodeVector,
+        on: v.code_vector_id == c.id,
+        where: v.transcription_chunk_id == ^chunk_id,
+        select: [:id, :code, :description]
+      )
+
     TranscriptionChunkCodeVector
     |> join(:inner, [chunk_vector], code_vector in assoc(chunk_vector, :code_vector))
     |> where([chunk_vector], chunk_vector.transcription_chunk_id == ^chunk_id)
     |> order_by([chunk_vector], desc: chunk_vector.cosine_similarity)
-    |> preload([:assigned_by_user, :code_vector])
+    |> preload([:assigned_by_user, code_vector: ^code_vector_query])
     |> Repo.all()
   end
 
@@ -186,10 +195,19 @@ defmodule Medicode.Transcriptions do
         transcription_chunk_ids,
         preload_transcription_chunk_associations \\ false
       ) do
+    code_vector_query =
+      from(
+        c in Medicode.Coding.CodeVector,
+        join: v in TranscriptionChunkCodeVector,
+        on: v.code_vector_id == c.id,
+        where: v.transcription_chunk_id in ^transcription_chunk_ids,
+        select: [:id, :code, :description]
+      )
+
     query =
       if preload_transcription_chunk_associations do
         TranscriptionChunk
-        |> preload([:keywords, :code_vectors])
+        |> preload([:keywords, code_vectors: ^code_vector_query])
       else
         TranscriptionChunk
       end