XeroAntiCheat v1.0.9 bug fixes

- BUG-1: Added alerts.cooldown_ms (default 5s) to throttle warn() and
  sendAlert() in PunishmentManager, preventing chat spam during high-frequency
  flags. Verbose output in ViolationManager also respects the cooldown.
  Kick/ban punishments always fire immediately regardless of cooldown.
- BUG-2: Fixed FlyCheck false positive with Jump Boost I - condition was
  incorrectly flagging players with Jump Boost level 1. Now exempts all
  jump boost levels from the sustained-flight flag.
- BUG-3: Optimized SpiderCheck by caching player.getLocation() in a single
  variable instead of calling it 3 times.

src/main/java/com/xeroth/xeroanticheat/manager/PunishmentManager.java

@@ -76,7 +76,17 @@ public class PunishmentManager {
         Check check = plugin.getCheckManager().getCheck(checkName);
         String category = check != null ? check.getCategory() : "misc";
         
-        sendAlert(player, checkName, vl, category);
+        long cooldownMs = plugin.getConfigManager().getInt("alerts.cooldown_ms", 5000);
+        long now = System.currentTimeMillis();
+        long lastWarn = data.getLastWarnTime(checkName);
+        boolean cooledDown = (now - lastWarn) >= cooldownMs;
+        
+        boolean isPunishment = vl >= kickVl;
+        
+        if (cooledDown || isPunishment) {
+            sendAlert(player, checkName, vl, category);
+            data.setLastWarnTime(checkName, now);
+        }
         
         if (vl >= permbanVl) {
             punish(player, checkName, "PERMBAN", permbanVl);
@@ -84,7 +94,7 @@ public class PunishmentManager {
             punish(player, checkName, "TEMPBAN", tempbanVl);
         } else if (vl >= kickVl) {
             punish(player, checkName, "KICK", kickVl);
-        } else if (vl >= warnVl) {
+        } else if (vl >= warnVl && cooledDown) {
             warn(player, checkName);
         }
     }