Add some more progress-style logging to Darwin server endpoints. (#32047)

Lets us track when endpoints/clusters/attributes are set up and attribute values
changed.

Author: bzbarsky-apple

src/darwin/Framework/CHIP/MTRDeviceController.mm

@@ -983,9 +983,12 @@ - (BOOL)addServerEndpoint:(MTRServerEndpoint *)endpoint
     [self asyncDispatchToMatterQueue:^() {
         [self->_serverEndpoints addObject:endpoint];
         [endpoint registerMatterEndpoint];
+        MTR_LOG_DEFAULT("Added server endpoint %u to controller %@", static_cast<chip::EndpointId>(endpoint.endpointID.unsignedLongLongValue),
+            self->_uniqueIdentifier);
     }
         errorHandler:^(NSError * error) {
-            MTR_LOG_ERROR("Unexpected failure dispatching to Matter queue on running controller in addServerEndpoint");
+            MTR_LOG_ERROR("Unexpected failure dispatching to Matter queue on running controller in addServerEndpoint, adding endpoint %u",
+                static_cast<chip::EndpointId>(endpoint.endpointID.unsignedLongLongValue));
         }];
     return YES;
 }
@@ -1008,12 +1011,16 @@ - (void)removeServerEndpointInternal:(MTRServerEndpoint *)endpoint queue:(dispat
     // tearing it down.
     [self asyncDispatchToMatterQueue:^() {
         [self removeServerEndpointOnMatterQueue:endpoint];
+        MTR_LOG_DEFAULT("Removed server endpoint %u from controller %@", static_cast<chip::EndpointId>(endpoint.endpointID.unsignedLongLongValue),
+            self->_uniqueIdentifier);
         if (queue != nil && completion != nil) {
             dispatch_async(queue, completion);
         }
     }
         errorHandler:^(NSError * error) {
             // Error means we got shut down, so the endpoint is removed now.
+            MTR_LOG_DEFAULT("controller %@ already shut down, so endpoint %u has already been removed", self->_uniqueIdentifier,
+                static_cast<chip::EndpointId>(endpoint.endpointID.unsignedLongLongValue));
             if (queue != nil && completion != nil) {
                 dispatch_async(queue, completion);
             }

src/darwin/Framework/CHIP/ServerEndpoint/MTRServerAttribute.mm

@@ -137,6 +137,8 @@ - (BOOL)setValueInternal:(NSDictionary<NSString *, id> *)value logIfNotAssociate
 
     _value = [value copy];
 
+    MTR_LOG_DEFAULT("Attribute value updated: %@", self); // Logs new as part of our description.
+
     MTRDeviceController * deviceController = _deviceController;
     if (deviceController == nil) {
         // We're not bound to a controller, so safe to directly update
@@ -183,6 +185,8 @@ - (BOOL)associateWithController:(nullable MTRDeviceController *)controller
 
     _deviceController = controller;
 
+    MTR_LOG_DEFAULT("Associated %@ with controller", self);
+
     return YES;
 }
 
@@ -218,4 +222,9 @@ - (void)updateParentCluster:(const app::ConcreteClusterPath &)cluster
     return _parentCluster;
 }
 
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"<MTRServerAttribute endpoint %u, cluster " ChipLogFormatMEI ", id " ChipLogFormatMEI ", value '%@'>", static_cast<EndpointId>(_parentCluster.mEndpointId), ChipLogValueMEI(_parentCluster.mClusterId), ChipLogValueMEI(_attributeID.unsignedLongLongValue), _value];
+}
+
 @end

src/darwin/Framework/CHIP/ServerEndpoint/MTRServerCluster.mm

@@ -313,6 +313,9 @@ - (BOOL)associateWithController:(nullable MTRDeviceController *)controller
 
     _deviceController = controller;
 
+    MTR_LOG_DEFAULT("Associated %@, attribute count %llu, with controller", self,
+        static_cast<unsigned long long>(attributeCount));
+
     return YES;
 }
 
@@ -408,6 +411,12 @@ - (CommandId *)matterGeneratedCommands
     return matterCommandList;
 }
 
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"<MTRServerCluster endpoint %u, id " ChipLogFormatMEI ">",
+                     _parentEndpoint, ChipLogValueMEI(_clusterID.unsignedLongLongValue)];
+}
+
 @end
 
 CHIP_ERROR MTRServerAttributeAccessInterface::Read(const ConcreteReadAttributePath & aPath, AttributeValueEncoder & aEncoder)

src/darwin/Framework/CHIP/ServerEndpoint/MTRServerEndpoint.mm

@@ -317,6 +317,9 @@ - (BOOL)finishAssociationWithController:(nullable MTRDeviceController *)controll
 
     _deviceController = controller;
 
+    MTR_LOG_DEFAULT("Associated %@, cluster count %llu, with controller",
+        self, static_cast<unsigned long long>(clusterCount));
+
     return YES;
 }
 
@@ -415,4 +418,9 @@ - (void)invalidate
     return [_serverClusters copy];
 }
 
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"<MTRServerEndpoint id %u>", static_cast<EndpointId>(_endpointID.unsignedLongLongValue)];
+}
+
 @end