fix: Add Market offer limits to prevent disconnect

[jprzimba]

Enforce per-player and per-item per-side market offer limits and cap returned results.

• Adds constants (MAX_MARKET_OFFERS_RETURNED=1500, MAX_MARKET_OFFERS_PER_SIDE=700, MAX_MARKET_OWN_OFFERS_PER_SIDE=1000) to IOMarket.hpp.
• Game::playerCreateMarketOffer now checks player and item per-side counts and blocks new offers with user message and log when limits are reached.
• IOMarket query functions now ORDER BY id DESC and apply LIMITs to reduce result set size. New DB helpers IOMarket::getPlayerOfferCountPerSide and IOMarket::getItemOfferCountPerSide added; DB failures return 0. Purpose: reduce DB load and mitigate market spam.

Market Bug

Market Bug