Add verify_genesis_op and VerifiedGenesisOp to crypto CLAUDE.md
contracts. Update root CLAUDE.md crypto description to mention
verification.

- Fixed alignment of trailing comments in function call arguments
- Normalized spacing after commas (removed excessive space for alignment)
- Reformatted multi-line assert! macro calls for consistency
- Improved line wrapping for method chains and struct literals

All formatting violations (approx. 18) in the test module have been resolved.

Replaces entire #[cfg(test)] mod tests block in crates/relay/src/routes/create_did.rs.

Changes:
- Remove TEST_MASTER_KEY constant (not needed for device-signed ceremony)
- Remove relay_signing_key insertion from insert_test_data
- Add make_signed_op() helper using crypto::build_did_plc_genesis_op
- Simplify TestSetup struct (remove signing_key_id, rotation_key_id)
- Simplify test_state_for_did (no signing_key_master_key manipulation)
- Update create_did_request to use new MM-90 request shape (rotationKeyPublic, signedCreationOp)

Replaces 7 MM-89 test functions with 9 MM-90 test functions:
✓ happy_path_promotes_account_and_returns_did (AC2.1/2.2/2.3/2.4/2.5/4.1/4.2/4.3)
✓ retry_with_pending_did_skips_plc_directory (AC2.6)
✓ invalid_signature_returns_400 (AC3.1)
✓ wrong_handle_in_op_returns_400 (AC3.2)
✓ wrong_service_endpoint_returns_400 (AC3.3)
✓ wrong_rotation_key_in_op_returns_400 (AC3.4)
✓ already_promoted_account_returns_409 (AC3.5)
✓ missing_auth_returns_401 (AC3.6)
✓ plc_directory_error_returns_502 (AC3.7)

All 185 relay tests pass. All workspace tests pass. Clippy: 0 warnings.