Added

• Contract tests against Physna's OpenAPI specification - A snapshot of the spec now lives in tests/fixtures/physna-openapi.json. For each of the 22 endpoints the client reads, a response body is generated from the spec's schema (once with only the required properties, once with all of them) and must deserialize into the model type the client uses, so a field Physna renames, drops or retypes fails in CI instead of as a deserialization error in a user's terminal. The asset states, metadata field types, dependency statuses and tenant roles the code hard-codes are compared with the spec's enumerations, the page sizes the client sends are checked against the spec's maximums, and every URL the client builds must exist. A weekly spec-drift workflow fetches the live spec and fails when any endpoint or schema the client depends on has changed, with the diff in the log and instructions for refreshing the snapshot.

Fixed

• Two things the contract tests found on their first run - A tenant without a display or short name (both optional in the spec) failed the whole tenant listing; both now default to empty. An asset listing without pageData (optional in the spec, absent in cursor mode) was rejected; it now reads as a single page.