feat(model): add ProbeData field and UpdateProbeData repository method

Add probe_data TEXT column to media_file for caching ffprobe results.
Add UpdateProbeData to MediaFileRepository interface and implementations.
Use hash:"ignore" tag so probe data doesn't affect MediaFile fingerprints.

db/migrations/20260307175815_add_codec_and_update_transcodings.go

@@ -50,11 +50,21 @@ func upAddCodecAndUpdateTranscodings(_ context.Context, tx *sql.Tx) error {
 			return err
 		}
 	}
+
+	// Add probe_data column for caching ffprobe results.
+	_, err = tx.Exec(`ALTER TABLE media_file ADD COLUMN probe_data TEXT DEFAULT NULL`)
+	if err != nil {
+		return err
+	}
 	return nil
 }
 
 func downAddCodecAndUpdateTranscodings(_ context.Context, tx *sql.Tx) error {
-	_, err := tx.Exec(`DROP INDEX IF EXISTS media_file_codec`)
+	_, err := tx.Exec(`ALTER TABLE media_file DROP COLUMN probe_data`)
+	if err != nil {
+		return err
+	}
+	_, err = tx.Exec(`DROP INDEX IF EXISTS media_file_codec`)
 	if err != nil {
 		return err
 	}

model/mediafile.go

@@ -58,6 +58,7 @@ type MediaFile struct {
 	BitDepth             int      `structs:"bit_depth" json:"bitDepth"`
 	Channels             int      `structs:"channels" json:"channels"`
 	Codec                string   `structs:"codec" json:"codec"`
+	ProbeData            string   `structs:"probe_data" json:"-" hash:"ignore"`
 	Genre                string   `structs:"genre" json:"genre"`
 	Genres               Genres   `structs:"-" json:"genres,omitempty"`
 	SortTitle            string   `structs:"sort_title" json:"sortTitle,omitempty"`
@@ -440,6 +441,7 @@ type MediaFileRepository interface {
 	CountBySuffix(options ...QueryOptions) (map[string]int64, error)
 	Exists(id string) (bool, error)
 	Put(m *MediaFile) error
+	UpdateProbeData(id string, data string) error
 	Get(id string) (*MediaFile, error)
 	GetWithParticipants(id string) (*MediaFile, error)
 	GetAll(options ...QueryOptions) (MediaFiles, error)

persistence/mediafile_repository.go

@@ -163,6 +163,11 @@ func (r *mediaFileRepository) Put(m *model.MediaFile) error {
 	return r.updateParticipants(m.ID, m.Participants)
 }
 
+func (r *mediaFileRepository) UpdateProbeData(id string, data string) error {
+	_, err := r.executeSQL(Update(r.tableName).Set("probe_data", data).Where(Eq{"id": id}))
+	return err
+}
+
 func (r *mediaFileRepository) selectMediaFile(options ...model.QueryOptions) SelectBuilder {
 	sql := r.newSelect(options...).Columns("media_file.*", "library.path as library_path", "library.name as library_name").
 		LeftJoin("library on media_file.library_id = library.id")

tests/mock_mediafile_repo.go

@@ -109,6 +109,17 @@ func (m *MockMediaFileRepo) Put(mf *model.MediaFile) error {
 	return nil
 }
 
+func (m *MockMediaFileRepo) UpdateProbeData(id string, data string) error {
+	if m.Err {
+		return errors.New("error")
+	}
+	if d, ok := m.Data[id]; ok {
+		d.ProbeData = data
+		return nil
+	}
+	return model.ErrNotFound
+}
+
 func (m *MockMediaFileRepo) Delete(id string) error {
 	if m.Err {
 		return errors.New("error")