Skip peer update on unchanged network map (#2236)

* Enhance network updates by skipping unchanged messages

Optimizes the network update process
by skipping updates where no changes in the peer update message received.

* Add unit tests

* add locks

* Improve concurrency and update peer message handling

* Refactor account manager network update tests

* fix test

* Fix inverted network map update condition

* Add default group and policy to test data

* Run peer updates in a separate goroutine

* Refactor

* Refactor lock

management/server/network.go

@@ -40,9 +40,9 @@ type Network struct {
 	Dns        string
 	// Serial is an ID that increments by 1 when any change to the network happened (e.g. new peer has been added).
 	// Used to synchronize state to the client apps.
-	Serial uint64
+	Serial uint64 `diff:"-"`
 
-	mu sync.Mutex `json:"-" gorm:"-"`
+	mu sync.Mutex `json:"-" gorm:"-" diff:"-"`
 }
 
 // NewNetwork creates a new Network initializing it with a Serial=0