The custom __init__ was missing all attributes except colors, breaking
the dataclass constructor interface and the GimpPaletteLoader node.
Restored full constructor with all parameters (name, raw_content,
source_filename, metadata, format_type).
Reactivated 26 specs from spec_pending covering: initialization,
GIMP parsing, generic parsing, PixelColor validation, utility methods,
formatting, export, properties, and error handling.
5 specs remain pending (parser metadata, generic hex parser, raw format).
Ranska
4c6c0711dc