monitoring: add apiary metrics scraping with bearer token auth

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

terraform/vault/secrets.tf

@@ -147,6 +147,12 @@ locals {
       auto_generate = false
       data          = { api_key = var.sonarr_api_key }
     }
+
+    # Bearer token for scraping apiary metrics
+    "hosts/monitoring01/apiary-token" = {
+      auto_generate   = true
+      password_length = 64
+    }
   }
 }