Add nine Harbor robotics tasks
Adds eb-habitat, smolvla-libero, pi06-libero-recap, navid, navila, mapgpt-r2r, rt1x-simplerenv, spatialvla-libero, and tracevla-simplerenv. The 12-robotics package now has release-wide integrity validation, private navigation answer-key exclusions, normalized host-specific paths, and clean replay contract metadata.
Validated the 10-task 12-robotics package: all nine added Harbor tasks pass the static replay-contract validator; the public tree has no private navigation answer keys, bytecode, credentials, or host-specific paths; and source_integrity.sha256 covers 666 public source files.
Superseded by #8, which carries all 15 robotics task packages at the 2026-09-06 state plus verifier_refs_required.json. This branch predates this week's material fixes, and five partially overlapping robotics PRs made it impossible to tell which version was authoritative -- the same class of confusion that produced the image/package mismatch found by the 2026-09-04 runtime audit. Closing in favour of #8.