v5.0.0 [IMPORTANT] - Limits, API, Smart Updater

• New! Earnings & loss limits - Cap how much each player can win or lose per period, with per-currency settings and permission tiers
• New! Smart auto-tune for limits - /cf limit auto-tune scans the last 30 days and suggests cap values for each currency
• New! Threshold warnings - Players get a heads-up when they cross 50/75/90% of any limit, configurable percentages and sound
• New! New /cf limit subcommands - me / player / reset / auto-tune for players and admins to inspect and manage limits
• New! Limit placeholders - 8 new placeholders per currency for HUD and scoreboard integration
• New! Severity-aware update notifications - Console color-codes [CRITICAL] / [IMPORTANT] / [PATCH] tags pulled from GitHub releases
• New! Public developer API - Other plugins can integrate with UltraCoinFlip via Jitpack, see the wiki for the API guide
• Fix! Setting game item lore to [] still left a "Right-click to cancel" line for the host - Empty custom lore is now fully respected
• Fix! Server thread freeze when many players opened the coinflip list - Bot stats are cached briefly and refreshed in the background
• Optimize! Player stats batch save no longer blocks the main thread - Saves now run off-thread so heavy stats traffic does not cause lag spikes
• Optimize! Removed unnecessary database read lock - Multiple players can read the MySQL database in parallel for smoother performance