Document the test matrix and record the 2026-07-18 Pulumi 9150/9150 run.

Add EN/RU testing guides, link them from README and docs indexes, and drop
stale native Python/Ansible/Terraform suite references.

docs/examples/terraform.md

@@ -2,14 +2,20 @@
 
 # Terraform
 
-Native suite (150 cases) lives under
-[`pulumi-tests/terraform/`](../../pulumi-tests/README.md):
-
-```bash
-make up && make seed
-make test-terraform-smoke
-make test-terraform
-```
-
 Configure providers against Engine HTTPS with lab credentials and disable TLS
 verification for the Compose self-signed certificate.
+
+```bash
+make up-local   # or: make up
+make seed
+```
+
+There is no separate Terraform test suite in this repo. Use the Pulumi contract
+matrix for full Engine surface coverage:
+
+```bash
+make pulumi-tests
+```
+
+See [Testing](../testing.md) and [`pulumi-tests/`](../../pulumi-tests/README.md).
+**Last verified (2026-07-18):** **9150 / 9150** passed.