ax(node): rename single-letter goroutine parameter p to connectedPeer

AX Principle 1: predictable names over short names. The goroutine
parameter in GetAllStats used `p *Peer` — a single-letter abbreviation
with no justification under the AX exception list (i, _, t, c only).
Renamed to `connectedPeer` to match the variable's semantic role.

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

pkg/node/controller.go

@@ -255,19 +255,19 @@ func (c *Controller) GetAllStats() map[string]*StatsPayload {
 
 	for _, peer := range peers {
 		waitGroup.Add(1)
-		go func(p *Peer) {
+		go func(connectedPeer *Peer) {
 			defer waitGroup.Done()
-			stats, err := c.GetRemoteStats(p.ID)
+			stats, err := c.GetRemoteStats(connectedPeer.ID)
 			if err != nil {
 				logging.Debug("failed to get stats from peer", logging.Fields{
-					"peer_id": p.ID,
-					"peer":    p.Name,
+					"peer_id": connectedPeer.ID,
+					"peer":    connectedPeer.Name,
 					"error":   err.Error(),
 				})
 				return // Skip failed peers
 			}
 			resultsMutex.Lock()
-			results[p.ID] = stats
+			results[connectedPeer.ID] = stats
 			resultsMutex.Unlock()
 		}(peer)
 	}