* test(e2e): add management suite covering key/team/user/org lifecycle and route permissions
* test(e2e): decouple the enforcement-flip assertion from upstream health
Polling for a 200 on the newly-allowed model required it to be a routable,
healthy upstream, which is not the contract under test; poll until the
key_model_access_denied 403 lifts instead, excluding 401 so a revoked key
cannot read as success. Also document that the delete test's deferred teardown
firing on an already-deleted key is deliberate: cleanup must survive the test
failing before the in-body delete, and the repeat delete is a warn-free no-op
(the proxy answers 404 No keys found)
* test(e2e): inline the management suite's model and tpm literals
* test(e2e): drop the models_mgmt suite line from the folder list
* test(e2e): write the tpm limit as a plain integer literal
