[feature] Process incoming Move activity (#2724)

* [feature] Process incoming account Move activity

* fix targetAcct typo

* put move origin account on fMsg

* shift more move functionality back to the worker fn

* simplify error logic

internal/federation/dereferencing/dereferencer.go

@@ -64,6 +64,16 @@ var (
 	// This is tuned to be quite fresh without
 	// causing loads of dereferencing calls.
 	Fresh = util.Ptr(FreshnessWindow(5 * time.Minute))
+
+	// 10 seconds.
+	//
+	// Freshest is useful when you want an
+	// immediately up to date model of something
+	// that's even fresher than Fresh.
+	//
+	// Be careful using this one; it can cause
+	// lots of unnecessary traffic if used unwisely.
+	Freshest = util.Ptr(FreshnessWindow(10 * time.Second))
 )
 
 // Dereferencer wraps logic and functionality for doing dereferencing