Predict dumping (#32394)

* Predict dumping

- This got soaped really fucking hard.
- Dumping is predicted, this required disposals to be predicte.d
- Disposals required mailing (because it's tightly coupled), and a smidge of other content systems.
- I also had to fix a compnetworkgenerator issue at the same time so it wouldn't mispredict.

* Fix a bunch of stuff

* nasty merge

* Some reviews

* Some more reviews while I stash

* Fix merge

* Fix merge

* Half of review

* Review

* re(h)f

* lizards

* feexes

* feex

Content.Shared/Disposal/Unit/BeforeDisposalFlushEvent.cs

@@ -0,0 +1,10 @@
+namespace Content.Shared.Disposal.Unit.Events;
+
+/// <summary>
+/// Sent before the disposal unit flushes it's contents.
+/// Allows adding tags for sorting and preventing the disposal unit from flushing.
+/// </summary>
+public sealed class BeforeDisposalFlushEvent : CancellableEntityEventArgs
+{
+    public readonly List<string> Tags = new();
+}