Establish clean homelab infrastructure baseline

Reorganize the brownfield repository, remove retired and generated artifacts, harden ignore rules, and record the GitOps/IaC redesign.

apps/smtp-relay/terraform/outputs.tf

@@ -0,0 +1,15 @@
+# Feed these into smtp-relay/secret.yaml (CLIENT_ID / CLIENT_SECRET / TENANT_ID).
+#   terraform output -raw client_id
+#   terraform output -raw tenant_id
+#   terraform output -raw client_secret
+
+output "client_id" {
+  value       = azuread_application.smtp_relay.client_id
+  description = "CLIENT_ID for the relay secret."
+}
+
+output "tenant_id" {
+  value       = data.azuread_client_config.current.tenant_id
+  description = "TENANT_ID for the relay secret."
+}
+