Relax Terraform version constraint to accept any 1.x release

Change required_version from exact '1.0.10' to '>= 1.0.0, < 2.0.0'
so that newer Terraform 1.x versions work without manual binary
download.

Closes #40

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: szachovy

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Completed [ARCHITECTURE.md](./docs/ARCHITECTURE.md) (#93)
 * Migrated CI from self-hosted to GitHub-hosted runners with Docker-in-Docker test infrastructure. (#94)
 * Test workflow always builds service images locally for reproducibility. (#97)
+* Relaxed Terraform version constraint to accept any 1.x release. (#40)
 
 ### Fixed
 

tests/setup/main.tf

@@ -1,5 +1,5 @@
 terraform {
-  required_version = "1.0.10"
+  required_version = ">= 1.0.0, < 2.0.0"
   required_providers {
     null = {
       source  = "hashicorp/null"