docs: add integration guides and incident runbooks (#20)

README.md

@@ -100,6 +100,8 @@ defined in [hostile-input and overload protection](docs/security/abuse-protectio
 Health semantics, bounded telemetry, alerting, audit privacy, and the authenticated
 operator controls are defined in the
 [observability and operator runbook](docs/operations/observability-and-operator-runbook.md).
+Concrete detect/contain/recover/verify procedures are in the
+[incident and change runbooks](docs/operations/incident-runbooks.md).
 The pinned non-root container, production topology, graceful drain, Linux
 hardening, smoke procedure, and recovery lifecycle are documented in
 [secure single-active Linux deployment](docs/deployment/linux.md).
@@ -111,6 +113,9 @@ signing, staged promotion, rollback, and migration are defined in
 [releases and compatibility](docs/releases/README.md).
 The scriptable host/browser/join diagnostic and its stable automation contract are
 documented in the [TestClient integration guide](docs/integration/test-client.md).
+The package, gameplay-socket, host-admission, provisioning, metadata, key rotation,
+versioning, and secure rollout seams are in the
+[game integration guide](docs/integration/sdk-seams.md).
 The always-on three-party scenarios, optional Linux namespace topology, and
 simulation limits are documented in the
 [deterministic topology harness](docs/integration/topology-harness.md).