docs: Explain current usage of score in .tag_result

lib/medical_transcription_web/components/transcription_text_component.ex

@@ -54,6 +54,8 @@ defmodule MedicalTranscriptionWeb.Components.TranscriptionTextComponent do
 
       <div class="flex-1 flex flex-col items-stretch gap-3">
         <%= for %CodeVector{id: id, code: code, description: label} <- @row.tags do %>
+          <!-- NOTE: We're not currently deriving a similarity score from our Postgres query using cosine similarity.
+               For now, pass 1.0 until we research whether we can determine that score from the query. -->
           <.tag_result code_vector_id={id} code={code} label={label} score={1.0} text={@row.text} />
         <% end %>
       </div>