ax(node): rename abbreviated mu/wg to resultsMutex/waitGroup in GetAllStats

AX Principle 1 — predictable names over short names. `mu` and `wg` require
mental mapping; `resultsMutex` and `waitGroup` state their purpose directly.

Co-Authored-By: Charon <charon@lethean.io>

pkg/node/controller.go

@@ -242,13 +242,13 @@ func (c *Controller) GetRemoteLogs(peerID, minerName string, lines int) ([]strin
 func (c *Controller) GetAllStats() map[string]*StatsPayload {
 	peers := c.peers.GetConnectedPeers()
 	results := make(map[string]*StatsPayload)
-	var mu sync.Mutex
-	var wg sync.WaitGroup
+	var resultsMutex sync.Mutex
+	var waitGroup sync.WaitGroup
 
 	for _, peer := range peers {
-		wg.Add(1)
+		waitGroup.Add(1)
 		go func(p *Peer) {
-			defer wg.Done()
+			defer waitGroup.Done()
 			stats, err := c.GetRemoteStats(p.ID)
 			if err != nil {
 				logging.Debug("failed to get stats from peer", logging.Fields{
@@ -258,13 +258,13 @@ func (c *Controller) GetAllStats() map[string]*StatsPayload {
 				})
 				return // Skip failed peers
 			}
-			mu.Lock()
+			resultsMutex.Lock()
 			results[p.ID] = stats
-			mu.Unlock()
+			resultsMutex.Unlock()
 		}(peer)
 	}
 
-	wg.Wait()
+	waitGroup.Wait()
 	return results
 }