fix(cypress): replace localhost IP with test-net IP in fixtures
Replace 127.0.0.1 with 192.0.2.1 (RFC 5737 TEST-NET-1) in Cypress
fixture files to prevent 'ip_not_allowed' errors from crypto payment
processors that block localhost IPs.
Files changed:
- confirm-body.json
- create-confirm-body.json
- create-mandate-cit.json
- save-card-confirm-body.json
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>