Improve library sync, add more config values

src/models/sheet.go

@@ -13,7 +13,7 @@ type Sheet struct {
 	Description  string         `json:"description"`
 	FilePath     string         `json:"file_path" gorm:"not null"`
 	FileSize     int64          `json:"file_size"`
-	FileHash     uint64         `json:"file_hash"`
+	FileHash     string         `json:"file_hash"`
 	ComposerUuid uuid.UUID      `json:"composer_uuid"`
 	Composer     Composer       `json:"composer" gorm:"foreignKey:ComposerUuid"`
 	CreatedAt    time.Time      `json:"created_at"`