chore(weights): per-label PR multipliers for genie-claw (optimization 0.8 / community 0.2)

[ai-hpc]

Summary

• Add label_multipliers for the existing Geniepod/genie-claw registry entry: optimization: 0.8, community-contribution: 0.2.
• Set default_label_multiplier: 0.2 so unlabeled PRs score at the community baseline rather than the implicit 1.0 (which would outrank both configured labels).
• Leave emission_share, issue_discovery_share, maintainer_cut, and eligibility unchanged.

Why

• genie-claw's contribution scope (README "The Edge Bet" / accepted-contribution rules) rewards measurable performance PRs — Jetson latency/throughput/memory wins with before→after proof — over general community contributions. This routes the PR score split accordingly: optimization PRs earn 4× the community baseline (0.8 vs 0.2).
• Labels are applied by the repo owner/maintainers only (no trusted_label_pipeline), matching MAINTAINER_ASSOCIATIONS gating in label_resolution.py.

Validation

• jq empty gittensor/validator/weights/master_repositories.json
• git diff --check -- gittensor/validator/weights/master_repositories.json
• uv run --extra dev pytest tests/validator/test_load_weights.py -q — 137 passed