Bug: Disabling FancyNpcs "java.util.concurrent.RejectedExecutionException"

### In which plugin has the error occurred?

FancyNpcs

### What happened?

.

### In which software has the error occurred?

Paper

### Plugin version

2.11.0

### Server version

26.2

### Relevant log output

```shell
[07:58:43 INFO]: [FancyNpcs] Disabling FancyNpcs v2.11.0
[07:58:43 ERROR]: Error occurred while disabling FancyNpcs v2.11.0
java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@70b041cd[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@153e5503[Wrapped task = de.oliver.fancyanalytics.logger.FancyLogger$$Lambda/0x000000008c5f7800@7b140a68]] rejected from java.util.concurrent.ThreadPoolExecutor@7d319ac3[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 1]
at java.base/java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2032) ~[?:?]
at java.base/java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:787) ~[?:?]
at java.base/java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1328) ~[?:?]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:125) ~[?:?]
at java.base/java.util.concurrent.Executors$DelegatedExecutorService.submit(Executors.java:696) ~[?:?]
at FancyNpcs-2.11.0.jar//de.oliver.fancyanalytics.logger.FancyLogger.log(FancyLogger.java:117) ~[?:?]
at FancyNpcs-2.11.0.jar//de.oliver.fancyanalytics.logger.ExtendedFancyLogger.log(ExtendedFancyLogger.java:60) ~[?:?]
at FancyNpcs-2.11.0.jar//de.oliver.fancyanalytics.logger.ExtendedFancyLogger.info(ExtendedFancyLogger.java:77) ~[?:?]
at FancyNpcs-2.11.0.jar//de.oliver.fancynpcs.FancyNpcs.onDisable(FancyNpcs.java:350) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:285) ~[paper-api-26.2.build.116-stable.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:236) ~[paper-26.2.jar:26.2-116-37dc545]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugins(PaperPluginInstanceManager.java:160) ~[paper-26.2.jar:26.2-116-37dc545]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugins(PaperPluginManagerImpl.java:97) ~[paper-26.2.jar:26.2-116-37dc545]
at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:540) ~[paper-api-26.2.build.116-stable.jar:?]
at org.bukkit.craftbukkit.CraftServer.disablePlugins(CraftServer.java:606) ~[paper-26.2.jar:26.2-116-37dc545]
at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:1028) ~[paper-26.2.jar:26.2-116-37dc545]
at net.minecraft.server.dedicated.DedicatedServer.stopServer(DedicatedServer.java:909) ~[paper-26.2.jar:26.2-116-37dc545]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1384) ~[paper-26.2.jar:26.2-116-37dc545]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:303) ~[paper-26.2.jar:26.2-116-37dc545]
at java.base/java.lang.Thread.run(Thread.java:1474) ~[?:?]
```

Start with FancyNpcs.onDisable at line 350 and trace the call into ExtendedFancyLogger and FancyLogger.log at line 117. Reproduce disabling FancyNpcs 2.11.0 on Paper 26.2 and inspect the executor lifecycle. Done means shutdown no longer emits the RejectedExecutionException shown in the log.

Written by the indexing model from the issue text.