chore: demote "no ignore file found" log from Info to Debug

The not-found case is the default expected state and fired on every
plan/apply/dump run, logging louder than the successful-load case
(already Debug). Demote to Debug for consistency and less noise.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: tianzhou

cmd/util/ignoreloader.go

@@ -126,7 +126,7 @@ func LoadIgnoreFileWithStructureFromPath(filePath string) (*ir.IgnoreConfig, err
 	// Check if file exists
 	if _, err := os.Stat(filePath); os.IsNotExist(err) {
 		// File doesn't exist, return nil config (no filtering).
-		logger.Get().Info("no ignore file found, no filtering applied",
+		logger.Get().Debug("no ignore file found, no filtering applied",
 			"file", absPath)
 		return nil, nil
 	} else if err != nil {