Add _match_api_key() class method to fusion.billing.service, with a
TDD test suite (TestServiceApiKey) covering key generation, hash storage,
positive match, and rejection of bad/inactive keys. Also fix
fcb_test_on_trial.sh to use --http-port 8070, as Odoo 19 forces
http_spawn() even under --no-http when --test-enable is set.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
