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.

app/db/migrations/005_token_lifecycle.sql

@@ -0,0 +1,6 @@
+INSERT INTO realms(name, kind) VALUES ('test', 'pve') ON CONFLICT (name) DO NOTHING;
+ALTER TABLE api_tokens
+    ADD COLUMN comment text,
+    ADD COLUMN privilege_separation boolean NOT NULL DEFAULT true,
+    ADD COLUMN created_at timestamptz NOT NULL DEFAULT now(),
+    ADD COLUMN updated_at timestamptz NOT NULL DEFAULT now();