test: run the customer controller tests against core-api 1.6.69

[roncodes]

Fixes PHP CI / build on #119 now that fleetbase/core-api 1.6.69 resolves and the suite runs against the real core for the first time. (Pest's own output does not reach the job log in this repo, so the failure was invisible there; locally with --log-junit the full suite is 789 tests, 0 failing with this change.)

Four tests in CustomerControllerContractsTest failed against the real core:

1. Hashed, single-use codes. Codes sent by SMS are stored as an HMAC and used up when accepted, so the test can no longer read the plain code from the row. It now records the texts handed to the Twilio fake and reads the code from them; it gives the customer a phone on file first, since core texts the code to the phone on file; it checks the accepted code is marked used; and after the account deletion that is made to fail, it requests a fresh closure code, because the accepted one was burned. That also restores the Sentry capture count the test expects (SMS and email attempts both fail on the closure request).
2. Two local verification_codes tables lacked the uuid and status columns that consume() writes.
3. verifyCode() builds a form request from a plain request and validates it (setContainer(), setRedirector(), validateResolved()). The bootstrap's FormRequest stub now has those, deferring to the request's own failedValidation() so the 422 response is attached. illuminate/validation is added as a dev dependency: core-api only lists it under its own require-dev, so nothing installed it here and the test could not construct a validator.

No runtime code changes.