chore(terraform): read traces sample rate from secrets

Author: thekaveman

terraform/app_service.tf

@@ -76,9 +76,10 @@ resource "azurerm_linux_web_app" "main" {
     "HEALTHCHECK_USER_AGENTS" = local.is_dev ? null : "${local.secret_prefix}healthcheck-user-agents)",
 
     # Sentry
-    "SENTRY_DSN"         = "${local.secret_prefix}sentry-dsn)",
-    "SENTRY_ENVIRONMENT" = local.env_name,
-    "SENTRY_REPORT_URI"  = "${local.secret_prefix}sentry-report-uri)",
+    "SENTRY_DSN"                = "${local.secret_prefix}sentry-dsn)",
+    "SENTRY_ENVIRONMENT"        = local.env_name,
+    "SENTRY_REPORT_URI"         = "${local.secret_prefix}sentry-report-uri)",
+    "SENTRY_TRACES_SAMPLE_RATE" = "${local.secret_prefix}sentry-traces-sample-rate)",
 
     # Environment variables for data migration
     "MST_SENIOR_GROUP_ID"                                  = "${local.secret_prefix}mst-senior-group-id)",