Use dedicated auth:apikey logger in GenerateRandomAPIKey

Agent-Logs-Url: https://github.com/github/gh-aw-mcpg/sessions/568a79f5-6ac8-4127-89d4-a791265c20b9

Co-authored-by: lpcox <15877973+lpcox@users.noreply.github.com>

Author: Copilot

internal/auth/apikey.go

@@ -3,19 +3,22 @@ package auth
 import (
 	"fmt"
 
+	"github.com/github/gh-aw-mcpg/internal/logger"
 	"github.com/github/gh-aw-mcpg/internal/strutil"
 )
 
+var logAPIKey = logger.New("auth:apikey")
+
 // GenerateRandomAPIKey generates a cryptographically random API key.
 // Per spec §7.3, the gateway SHOULD generate a random API key on startup
 // if none is provided. Returns a 32-byte hex-encoded string (64 chars).
 func GenerateRandomAPIKey() (string, error) {
-	log.Print("Generating random API key")
+	logAPIKey.Print("Generating random API key")
 	key, err := strutil.RandomHex(32)
 	if err != nil {
-		log.Printf("Random API key generation failed: %v", err)
+		logAPIKey.Printf("Random API key generation failed: %v", err)
 		return "", fmt.Errorf("failed to generate random API key: %w", err)
 	}
-	log.Print("Random API key generated successfully")
+	logAPIKey.Print("Random API key generated successfully")
 	return key, nil
 }