feat: Define transcriptions association on user

lib/medical_transcription/accounts/user.ex

@@ -16,6 +16,8 @@ defmodule MedicalTranscription.Accounts.User do
     field :hashed_password, :string, redact: true
     field :confirmed_at, :naive_datetime
 
+    has_many :transcriptions, MedicalTranscription.Transcriptions.Transcription
+
     timestamps(type: :utc_datetime)
   end