chore: improve terraform gitignore patterns

Add wildcard patterns to catch all tfstate and tfvars backup variants
(e.g., *.tfstate.backup, *.tfstate.dill-vc-backup, etc.)

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

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

Author: TonsOfFun

.gitignore

@@ -47,6 +47,7 @@ screenshots/
 terraform/.terraform/
 terraform/.terraform.lock.hcl
 terraform/*.tfstate
-terraform/*.tfstate.backup
-terraform/terraform.tfvars
+terraform/*.tfstate.*
+terraform/*.tfvars
+terraform/*.tfvars.*
 terraform/.terraform.tfstate.lock.info