Addresses technical debt by removing obsolete documentation, eliminating non-English comments, and adding comprehensive PEP-257 docstrings to core modules for production readiness.

Changes

Removed obsolete files (8 total)

• Duplicate implementation summaries: IMPLEMENTATION_SUMMARY.md, IMPLEMENTATION_SUMMARY_NEW.md, tests/dummy_servers/IMPLEMENTATION_SUMMARY.md
• Implementation detail doc: CURSOR_AND_COLORS_DOCUMENTATION.md
• Demo scripts masquerading as tests: demo_fps_speed_timing.py, demo_resnet_spectrogram_integration.py, demo_spectrogram_colormap.py, demo_spectrogram_scrolling.py

Internationalized codebase

• Translated French comments to English in basenode.py and sound.py
• No Japanese characters found in codebase

Added PEP-257 docstrings to core modules

• main.py: Module, all functions with parameter/return documentation
• node_abc.py: Abstract base class with complete interface documentation
• basenode.py: Module, DataType/PortType/Node classes, all methods
• _node_image.py: Module, FactoryNode/ImageNode classes, all methods
• __init__.py, sound.py: Module docstrings

Code cleanup

• Removed unused variables in main.py (editor_width, editor_height)

Example

Before:

class Node:
    def __init__(self, node_id=1, connection_dict=None, opencv_setting_dict=None):
        # Paramètres OpenCV
        self._opencv_setting_dict = opencv_setting_dict if opencv_setting_dict else {}

After:

class Node:
    """Base class for all nodes in the CV Studio node editor.
    
    Provides common functionality for all node types including image conversion,
    input/output handling, and configuration management.
    """
    
    def __init__(self, node_id=1, connection_dict=None, opencv_setting_dict=None):
        """Initialize a new Node instance.
        
        Parameters
        ----------
        node_id : int, optional
            Unique identifier for this node instance. Default is 1.
        connection_dict : dict, optional
            Dictionary defining the node's connections. Default is None.
        opencv_setting_dict : dict, optional
            Configuration dictionary for OpenCV and application settings.
        """
        # OpenCV parameters
        self._opencv_setting_dict = opencv_setting_dict if opencv_setting_dict else {}

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