fix: honor weekly refresh history and phone scoring config

[Seungpyo1007]

Summary

• Set fetch-depth: 0 for the TechAPI checkout in weekly-refresh.yml so dump timestamps use complete git history.
• Apply weights.phone_overall and weights.value from config/scoring.yaml in phone scoring instead of hardcoded formulas.
• Add regression coverage for configured overall/value weights.

Scoring impact

The current configured phone_overall weights are performance: 0.30, camera: 0.25, battery: 0.20, and display: 0.25, whereas the previous implementation used an equal 25% average. The current value configuration is already 50/50, so value scoring remains equivalent. Overall scores may change for phones whose component scores differ; this is the intended effect of activating the existing configuration.

Validation

• Targeted scoring tests: 17 passed
• Ruff: passed
• Mypy (app and scoring services): passed
• Full pytest: 280 passed, 1 skipped; 28 unrelated integration failures because the TechAPI data submodule is not populated in this worktree.