Add pending_mutations to access_code resource samples

Required by @seamapi/types 1.803.0 which added pending_mutations
as a required field on access codes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: louis-pre

codegen/data/resource-sample-definitions/all-resources.yaml

@@ -714,6 +714,7 @@
     device_id: c9cd621d-ef0c-45c8-b608-026ebdb74615
     ends_at: '2025-07-04T16:54:17.946049Z'
     errors: []
+    pending_mutations: []
     is_backup: false
     is_backup_access_code_available: false
     is_external_modification_allowed: false
@@ -740,6 +741,7 @@
     device_id: c9cd621d-ef0c-45c8-b608-026ebdb74615
     ends_at: null
     errors: []
+    pending_mutations: []
     is_backup: false
     is_backup_access_code_available: true
     is_external_modification_allowed: true
@@ -1057,6 +1059,7 @@
     device_id: c9cd621d-ef0c-45c8-b608-026ebdb74615
     ends_at: '2025-07-04T16:54:17.946049Z'
     errors: []
+    pending_mutations: []
     is_backup: false
     is_backup_access_code_available: true
     is_external_modification_allowed: true
@@ -1083,6 +1086,7 @@
     device_id: c9cd621d-ef0c-45c8-b608-026ebdb74615
     ends_at: '2025-07-04T16:54:17.946049Z'
     errors: []
+    pending_mutations: []
     is_backup: false
     is_backup_access_code_available: false
     is_external_modification_allowed: false