fix: cross-platform build, manifest verification, sensing server warnings, and off-axis robustness

[RMNO21]

Summary of Changes

This PR resolves cross-platform compilation and manifest verification issues, eliminates compiler warnings in the sensing server, and enhances mathematical robustness in off-axis perspective projection:

1. Harness & Provenance Manifest Integrity:

   • Added harness/homecore/** text=auto eol=lf to .gitattributes to ensure byte-for-byte LF provenance preservation across operating systems.
   • Updated harness/homecore/.harness/manifest.sha256 to pass npm run manifest:verify.

2. Windows Desktop Crate-Type Linking:

   • Changed crate-type in v2/crates/wifi-densepose-desktop/Cargo.toml from ["staticlib", "cdylib", "rlib"] to ["lib"] to prevent GCC/MinGW linker export ordinal overflow (>65535 symbol limit on PE/COFF).

3. Compiler Warnings & Struct Field Initialization:

   • Pre-computed multistatic_cfg before AppStateInner instantiation in v2/crates/wifi-densepose-sensing-server/src/main.rs, removing the unused_assignments compiler warning.
   • Cleaned up unused mut in matter/bridge.rs and unused imports in matter/commissioning.rs.

4. Orthonormal Basis Robustness in Off-Axis Projection:

   • Re-orthogonalized vu = vn.cross(vr) in ruview-offaxis::Screen::new to guarantee that {vr, vu, vn} forms an exact right-handed orthonormal basis (zero shear / pure rotation matrix) even when physical screen corner measurements have slight non-perpendicularities.
   • Added unit test screen_basis_is_strictly_orthonormal_under_skewed_corners in projection.rs.

Verification

• npm test && npm run test:security && npm run brain:verify && npm run manifest:verify && npm run flywheel:plan in harness/ruview: PASS (81 tests, 13 security tests, 0 findings)
• npm test && npm run test:security && npm run brain:verify -- --repo ../.. && npm run manifest:verify in harness/homecore: PASS (27 tests, 23 security tests, 0 findings)
• cargo test -p ruview-offaxis -p wifi-densepose-sensing-server --no-default-features in v2: PASS (287 tests passed, 0 failed, 0 warnings)
• python archive/v1/data/proof/verify.py: PASS (VERDICT: PASS, bit-exact hash match)