Add minimal Booster 1.7 compatibility

[alexschmander]

Goal

Make Hulk compatible with Booster OS v1.7.2.0-release-00331-2026-07-28-global without adding optional SDK 1.7 features.

Required changes

• Change the Loco API 2008 GetUp request from an empty body to {"version":0}.
• Keep the existing LocoClient::get_up signature and current V1 recovery behavior.
• Add a focused unit test for the exact GetUp request body.
• Set os_version in hulk.toml to v1.7.2.0-release-00331-2026-07-28-global.

Acceptance criteria

• cargo test -p booster_sdk_interface passes.
• cargo clippy -p booster_sdk_interface --all-targets passes.
• pepsi upload and pepsi pre-game accept a robot reporting the pinned OS version.
• A GetUp request succeeds on a 1.7.2 robot and retains V1 recovery behavior.
• Existing Booster CDR types, topics, API IDs, and other request bodies remain unchanged.

Out of scope

• GetUp V2 selection or configuration
• New SDK 1.7 topics and APIs
• RPC transport refactoring
• DDS or ROS message regeneration
• Zenoh bridge changes

Upstream reference

• Booster SDK 1.7 merge: BoosterRobotics/booster_robotics_sdk@d5d8f7a
• Loco API: https://github.com/BoosterRobotics/booster_robotics_sdk/blob/main/include/booster/robot/b1/b1_loco_api.hpp