excel

type Source struct {
	// Configuration
	BasePath  string // e.g., ./uploads or absolute path
	Pattern   string // e.g., **/*.xlsx (glob relative to BasePath) or a single file name
	Sheet     string // sheet name; if empty, uses first sheet
	HeaderRow int    // 0 for none, otherwise 1-based row index for headers
	StartRow  int    // 1-based data start row (if HeaderRow>0 and StartRow==0, StartRow=HeaderRow+1)
	BatchSize int    // not used for streaming; reserved for future buffering

	// Backend selector: local (default) | http | s3
	SourceType string
	// HTTP
	URL     string
	Headers map[string]string
	// S3
	S3Region    string
	S3Bucket    string
	S3KeyPrefix string // or single key
	S3Endpoint  string
	S3AccessKey string
	S3SecretKey string
	// contains filtered or unexported fields
}