feat: configure S3 backend and add TWC credentials

- Update backend.tf with new bucket ceae9495-terraform-state
- Use new endpoints syntax (deprecated endpoint removed)
- Add S3 credentials and TWC_TOKEN to .env.example

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: justgithubaccount

.env.example

@@ -1,10 +1,11 @@
 # === Infrastructure ===
-# Timeweb Cloud API token (required)
+# Timeweb Cloud API token (required for Terraform and TWC CLI)
 TF_VAR_timeweb_token=your-timeweb-token-here
+TWC_TOKEN=your-timeweb-token-here
 
 # S3 credentials for Terraform backend (Timeweb S3)
-AWS_ACCESS_KEY_ID=your-s3-access-key
-AWS_SECRET_ACCESS_KEY=your-s3-secret-key
+AWS_ACCESS_KEY_ID=LT98WU4OFJ3TL306KONR
+AWS_SECRET_ACCESS_KEY=3RlOKpwnCx2MktBqiui2XS4OxBeI3P0f9QM1NzTG
 
 # === Kubernetes Cluster ===
 TF_VAR_project_id=1115913

terraform/timeweb/backend.tf

@@ -1,9 +1,12 @@
 terraform {
   backend "s3" {
-    bucket   = "ceae9495-895a43c8-e4e3-424e-9599-6e5b95862164"
-    key      = "terraform/infra.tfstate"
-    region   = "ru-1"
-    endpoint = "https://s3.twcstorage.ru"
+    bucket = "ceae9495-terraform-state"
+    key    = "terraform/infra.tfstate"
+    region = "ru-1"
+
+    endpoints = {
+      s3 = "https://s3.twcstorage.ru"
+    }
 
     skip_credentials_validation = true
     skip_metadata_api_check     = true