Fix event mapper

Author: francisco-videira-nhs

infrastructure/terraform/components/api/event_source_mapping_status_updates_to_handler.tf

@@ -0,0 +1,14 @@
+resource "aws_lambda_event_source_mapping" "status_updates_sqs_to_status_update_handler" {
+  event_source_arn                   = module.letter_status_updates_queue.sqs_queue_arn
+  function_name                      = module.letter_status_update.arn
+  batch_size                         = 10
+  maximum_batching_window_in_seconds = 1
+  scaling_config { maximum_concurrency = 10 }
+
+  depends_on = [
+    module.letter_status_updates_queue,         # ensures queue exists
+    module.letter_status_update                 # ensures update handler exists
+    # aws_iam_role_policy.letter_status_update, # ensures permissions exist?
+    # aws_iam_role_policy.post_letters_receiver # ensures permissions exist?
+  ]
+}