Initial commit: VMware vSphere API simulator scaffold.

Add the FastAPI app, PostgreSQL migrations, Docker/Helm packaging, API
contracts, docs, client examples, and the unit/integration/compatibility
test suite for local client and tooling labs without a real vCenter.

tests/unit/test_schema_examples.py

@@ -0,0 +1,25 @@
+"""Tests for contract example generation."""
+
+from app.contracts.examples import path_param_example, schema_example
+from app.contracts.model import Schema
+
+
+def test_path_param_examples_use_known_placeholders() -> None:
+    assert path_param_example("node") == "pve01"
+    assert path_param_example("vmid") == 100
+
+
+def test_schema_example_prefers_default_and_enum() -> None:
+    assert schema_example(Schema(type="string", default="custom")) == "custom"
+    assert schema_example(Schema(type="string", enum=("a", "b"))) == "a"
+
+
+def test_schema_example_builds_object_and_array() -> None:
+    schema = Schema(
+        type="object",
+        properties={
+            "count": Schema(type="integer", minimum=2),
+            "enabled": Schema(type="boolean", optional=True),
+        },
+    )
+    assert schema_example(schema) == {"count": 2}