Refactor blob storage to use UUID primary keys and implement streaming chunking

- Changed blob table to use ID (UUID) as primary key instead of hash
- Blob records are now created at packing start, enabling immediate chunk associations
- Implemented streaming chunking to process large files without memory exhaustion
- Fixed blob manifest generation to include all referenced blobs
- Updated all foreign key references from blob_hash to blob_id
- Added progress reporting and improved error handling
- Enforced encryption requirement for all blob packing
- Updated tests to use test encryption keys
- Added Cyrillic transliteration to README

internal/database/file_chunks.go

@@ -62,6 +62,36 @@ func (r *FileChunkRepository) GetByPath(ctx context.Context, path string) ([]*Fi
 	return fileChunks, rows.Err()
 }
 
+// GetByPathTx retrieves file chunks within a transaction
+func (r *FileChunkRepository) GetByPathTx(ctx context.Context, tx *sql.Tx, path string) ([]*FileChunk, error) {
+	query := `
+		SELECT path, idx, chunk_hash
+		FROM file_chunks
+		WHERE path = ?
+		ORDER BY idx
+	`
+
+	LogSQL("GetByPathTx", query, path)
+	rows, err := tx.QueryContext(ctx, query, path)
+	if err != nil {
+		return nil, fmt.Errorf("querying file chunks: %w", err)
+	}
+	defer CloseRows(rows)
+
+	var fileChunks []*FileChunk
+	for rows.Next() {
+		var fc FileChunk
+		err := rows.Scan(&fc.Path, &fc.Idx, &fc.ChunkHash)
+		if err != nil {
+			return nil, fmt.Errorf("scanning file chunk: %w", err)
+		}
+		fileChunks = append(fileChunks, &fc)
+	}
+	LogSQL("GetByPathTx", "Complete", path, "count", len(fileChunks))
+
+	return fileChunks, rows.Err()
+}
+
 func (r *FileChunkRepository) DeleteByPath(ctx context.Context, tx *sql.Tx, path string) error {
 	query := `DELETE FROM file_chunks WHERE path = ?`
 
@@ -81,5 +111,16 @@ func (r *FileChunkRepository) DeleteByPath(ctx context.Context, tx *sql.Tx, path
 
 // GetByFile is an alias for GetByPath for compatibility
 func (r *FileChunkRepository) GetByFile(ctx context.Context, path string) ([]*FileChunk, error) {
-	return r.GetByPath(ctx, path)
+	LogSQL("GetByFile", "Starting", path)
+	result, err := r.GetByPath(ctx, path)
+	LogSQL("GetByFile", "Complete", path, "count", len(result))
+	return result, err
+}
+
+// GetByFileTx retrieves file chunks within a transaction
+func (r *FileChunkRepository) GetByFileTx(ctx context.Context, tx *sql.Tx, path string) ([]*FileChunk, error) {
+	LogSQL("GetByFileTx", "Starting", path)
+	result, err := r.GetByPathTx(ctx, tx, path)
+	LogSQL("GetByFileTx", "Complete", path, "count", len(result))
+	return result, err
 }