[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/account.go

@@ -64,8 +64,8 @@ func accountFresh(
 		return true
 	}
 
-	if !account.SuspendedAt.IsZero() {
-		// Can't refresh
+	if account.IsSuspended() {
+		// Can't/won't refresh
 		// suspended accounts.
 		return true
 	}
@@ -388,8 +388,9 @@ func (d *Dereferencer) enrichAccountSafely(
 	account *gtsmodel.Account,
 	accountable ap.Accountable,
 ) (*gtsmodel.Account, ap.Accountable, error) {
-	// Noop if account has been suspended.
-	if !account.SuspendedAt.IsZero() {
+	// Noop if account suspended;
+	// we don't want to deref it.
+	if account.IsSuspended() {
 		return account, nil, nil
 	}