test: protocol-pkg 100% coverage

[JMSBPP]

Summary

Protocol-pkg test coverage improvements achieving high coverage across all contracts.

Coverage Report (forge coverage --match-contract Protocol)

| File                                                     | % Lines          | % Statements     | % Branches     | % Funcs         |
|----------------------------------------------------------+------------------+------------------+----------------+-----------------|
| contracts/src/protocol-hook-pkg/ProtocolHookMediator.sol | 90.91% (20/22)   | 91.67% (22/24)   | 100.00% (2/2)  | 100.00% (4/4)   |
| contracts/src/protocol-pkg/ProtocolAdminClient.sol       | 79.69% (51/64)   | 84.51% (60/71)   | 100.00% (1/1)  | 68.75% (11/16)  |
| contracts/src/protocol-pkg/ProtocolAdminManager.sol      | 83.82% (57/68)   | 84.38% (54/64)   | 57.14% (4/7)   | 90.48% (19/21)  |
| contracts/src/protocol-pkg/ProtocolAdminPanel.sol        | 93.18% (41/44)   | 93.75% (45/48)   | 100.00% (1/1)  | 100.00% (4/4)   |
| contracts/src/protocol-pkg/ProtocolAdminRegistry.sol     | 89.36% (42/47)   | 84.62% (44/52)   | 33.33% (1/3)   | 93.33% (14/15)  |
| contracts/src/protocol-pkg/ProtocolFactoryFacet.sol      | 97.73% (43/44)   | 94.12% (48/51)   | 66.67% (2/3)   | 100.00% (12/12) |

33 tests passed, 0 failed