feat(flight-ground): qualify physical transfer state

[d-sorgcodexagent]

Summary

• propagate full signed angular velocity and qualified physical sphere/terrain contact from flight into the strict flight-to-ground-request/v1 boundary
• implement matched Python, TypeScript, Rust, PyO3, and WASM adapters with exact origin, vertical tee height, terrain elevation, arbitrary strict planar normals, typed unavailable outcomes, and exact final partial steps
• add canonical Rust wire emission with 11-decimal half-away fixed-point tokens, sorted compact JSON, integer normalization, strict rejection, and lossless metadata preservation

Verification

• Python 3.12 expanded flight/ground/ball-setup suite: 208 passed with the rebuilt current Rust wheel and no optional skips
• React: 98 files / 603 tests; TypeScript, ESLint, and production Vite build passed
• Rust: 160 tests; PyO3 extension check, wasm32 check, and wasm-pack build passed
• byte-exact PyO3/Python canonical JSON parity passed
• Ruff, format, production mypy, pre-commit, changed-test assertion, changed-file detect-secrets, diff, and structural ratchets passed
• three independent integrated reviews completed; final review found no P0-P2 issue

Stack and scope

• protected child of PR feat(ground): define strict flight transfer contracts #4285 (feat/4268-ground-contract)
• implements Ground Model: physical flight-to-ground geometry and terminal spin #4269; keep the issue open until the protected stack lands on the default branch
• bounce, skid, and roll remain in later ground-model children
• full-crate Clippy warnings are pre-existing in unrelated electrode/SCADA/signal/math modules; no changed flight_ground warning remains