[PRMP-1511] Add APIM URL to pdf-stitching-lambda

Author: abbas-khan10

infrastructure/lambda-pdf-stitching.tf

@@ -20,6 +20,7 @@ module "pdf-stitching-lambda" {
   api_execution_arn       = null
   is_invoked_from_gateway = false
   lambda_environment_variables = {
+    APIM_API_URL                          = data.aws_ssm_parameter.apim_url.value
     PDF_STITCHING_SQS_URL                 = module.sqs-stitching-queue.sqs_url
     NRL_SQS_URL                           = module.sqs-nrl-queue.sqs_url
     LLOYD_GEORGE_BUCKET_NAME              = "${terraform.workspace}-${var.lloyd_george_bucket_name}"