add track-record reset; drop dead distance_penalty_factor knob

Track Record: new "Reset" action (POST /admin/track-record/reset) deletes all
trade setups so stats start fresh after material scoring/setup changes — live
setups regenerate on the next scan. Guarded by a confirm dialog.

Recommendation config: remove distance_penalty_factor, which was exposed in the
admin UI but consumed nowhere (the touch-probability model superseded it). A
knob that silently does nothing is worse than no knob. Remaining defaults are
left as-is — they're reasonable, and the honest way to tune them is backtesting
against accumulated outcomes, not invented "researched" numbers.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/schemas/admin.py

@@ -49,7 +49,6 @@ class RecommendationConfigUpdate(BaseModel):
     confidence_diff_threshold: float | None = Field(default=None, ge=0, le=100)
     signal_alignment_weight: float | None = Field(default=None, ge=0, le=1)
     sr_strength_weight: float | None = Field(default=None, ge=0, le=1)
-    distance_penalty_factor: float | None = Field(default=None, ge=0, le=1)
     momentum_technical_divergence_threshold: float | None = Field(default=None, ge=0, le=100)
     fundamental_technical_divergence_threshold: float | None = Field(default=None, ge=0, le=100)