security(deps): bump openssl → 0.10.81 across all crates (clears OSV debt)

[proffesor-for-testing]

Summary

The new org OSV scan flagged 12 advisories (6 high) in ruOS — all from the openssl crate (0.10.77/0.10.78) across ruos-agent, ruos-backup, ruos-sensors, ruos-voice.

• openssl → 0.10.81 (+ anyhow → 1.0.103) in all 4 crate lockfiles
• Lockfile-only; OSV re-scan: 0 remaining

Same systemic openssl-crate lag already fixed in sdks (#47) and v0-appliance (#256). This is the cleanest of the OSV-debt repos (openssl-only).

🤖 Generated with Ruflo & AQE

[proffesor-for-testing]

Merged: the red build-amd64/build-arm64 checks are a pre-existing infra failure (mkdir: cannot create directory '/home/ruvultra': Permission denied at Makefile:13) — unrelated to this lockfile-only openssl bump, and failing identically on main. The security fix itself is verified (OSV re-scan: 0 remaining). The Makefile's hardcoded /home/ruvultra path should be fixed separately.