Edge iOS PAC attachment fixtures

1. Inline PDF (direct 200, no Content-Disposition)
2. Attachment PDF (direct 200)
3. Attachment ZIP (direct 200)
4. Attachment PDF (same-origin 302, then 200)

PDF SHA-256: f31a6b2415d9233c628f44d0bf9392ebee064bdfd4c9e9c78a13db6c18795e23

ZIP SHA-256: 142fc2e5cb4dfd0c1e2abaa0a12031b9e0510c47f77fc1524e6484fd198f8c1b