refactor: split modules and harden scraping workflows

internal/service/organizer_sidecar.go

@@ -0,0 +1,29 @@
+package service
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// transferSidecarNFO moves/copies/links the .nfo sidecar alongside its media
+// using the same transfer mode, so metadata follows the organized file.
+func transferSidecarNFO(srcMedia, dstMedia string, mode TransferMode) error {
+	src := nfoPath(srcMedia)
+	dst := nfoPath(dstMedia)
+	if src == dst {
+		return nil
+	}
+	if _, err := os.Stat(src); err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	if _, err := os.Stat(dst); err == nil {
+		return nil
+	}
+	if err := os.MkdirAll(filepath.Dir(dst), 0o755); err != nil { // #nosec G301 -- sidecar media directories must remain readable by NAS/player users.
+		return err
+	}
+	return transferFile(src, dst, mode)
+}