Add Terraform plan-to-config reconciliation script

infrastructure/terraform/README.md

@@ -31,6 +31,22 @@ Current intent:
 3. Add Proxmox inventory/configuration scaffolding and imports later.
 4. Introduce Ansible workflow after Terraform-managed inventory is trustworthy.
 
+
+## Plan-to-config helper script
+
+Use `scripts/reconcile_from_plan.sh` to automate Terraform configuration generation from `terraform plan` output (via Terraform's `-generate-config-out`).
+
+From a Terraform module directory (for example `infrastructure/terraform/docker`):
+
+```bash
+../../scripts/reconcile_from_plan.sh --output-file zz_generated_from_plan.auto.tf
+```
+
+Notes:
+- Best used with an import-first workflow that already contains `import {}` blocks.
+- The script writes generated config into a `.auto.tf` file and runs `terraform fmt` on it.
+- Always review generated arguments before apply.
+
 ## Safety notes
 
 - State files are intentionally gitignored for safety and portability.