Clean up unused code and sync Terraform state

- Remove unused Express server (server.js)
- Remove unused API route (src/pages/api/filaments.ts)
- Remove Express dependency and related scripts from package.json
- Import existing AWS domain association into Terraform
- Add domain configuration to terraform.tfvars
- Update domain association to include www and dev subdomains
- Set wait_for_verification to false to avoid timeouts

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

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

terraform.tfstate

@@ -0,0 +1,9 @@
+{
+  "version": 4,
+  "terraform_version": "1.5.7",
+  "serial": 1,
+  "lineage": "6405bb5f-e094-2fa4-339e-33ddd7ca840f",
+  "outputs": {},
+  "resources": [],
+  "check_results": null
+}