contract-testing-roster

Use when an agent must produce a provider-side contract test for THIS service's API and needs to know the stack adapter and whether the optional Microcks verification layer is enabled. Resolves the stack and reads the Microcks opt-in (off by default), then points to the concrete contract-testing-<stack> adapter. Loaded by the contract-testing-worker. A baseline in-process integration test is always produced; Microcks contract verification is an additive opt-in.