refactor: rename internal/log to internal/logging to avoid stdlib

shadowing

- refactor: rename `internal/log` → `internal/logging`, package `log` →
  `logging`
- refactor: update imports in `cmd/serve.go` and
  `internal/middleware/requestid.go`

cmd/serve.go

@@ -12,7 +12,7 @@ import (
 
 	"github.com/dhao2001/mygo/internal/app"
 	"github.com/dhao2001/mygo/internal/config"
-	mygolog "github.com/dhao2001/mygo/internal/log"
+	"github.com/dhao2001/mygo/internal/logging"
 	"github.com/dhao2001/mygo/internal/server"
 )
 
@@ -29,7 +29,7 @@ var serveCmd = &cobra.Command{
 		}
 
 		// Set up structured logging before anything else.
-		appLogger := mygolog.NewLogger(cfg.Log)
+		appLogger := logging.NewLogger(cfg.Log)
 		slog.SetDefault(appLogger)
 		slog.Info("mygo server starting")
 		if loadInfo.EphemeralJWTSecret {