v0.16.2

mintUserSessionKey: name the shared-schema binding around the project. The two flat options added in 0.16.0 (schemaOwnerOrgId + schemaProjectId) are replaced by one project-centric option — schemaProject: { organizationId, projectId } — naming “the project that owns the schema” as a single concept. The wire format is unchanged (the SDK still sends the same keys), so no server redeploy is needed. Released as a patch: the replaced options shipped in 0.16.0 and have no external consumers yet.
```
// before
mintUserSessionKey({ organizationId, schemaOwnerOrgId, schemaProjectId, ... });
// after
mintUserSessionKey({
  organizationId,                                  // data org
  schemaProject: { organizationId, projectId },    // the project that owns the schema
  ...
});
```