Pipeline audit overhaul and resolution engine v2
Completed 7 pipeline audit fixes (atomic price writes, ≤3 bulk DB calls per refresh, quota tracking, thundering-herd guard, image fetch hardening, TTL centralization) and shipped PokeWallet resolution v2: restructured 4-stage fallback with set_code+number first, critical API corrections, card number normalization, and CardMarket pricing fallback.
