[BUG] isinstance(fig, go.Figure) raises TypeError after activating plotly-resampler

[Blubbaa]

Describe the bug 🖍️
After calling register_plotly_resampler(mode="auto"), using isinstance(fig, go.Figure) raises a TypeError instead of returning a boolean. This breaks downstream code that validates figure instances with isinstance().

Reproducing the bug 🔍

import numpy as np
import plotly.graph_objects as go
from plotly.graph_objs._figure import Figure
from plotly_resampler import register_plotly_resampler

if __name__ == "__main__":
    # Before registration, this works fine
    fig = go.Figure()
    print(isinstance(fig, go.Figure))  # True

    # After registration, this raises TypeError
    register_plotly_resampler(mode="auto")
    fig = go.Figure()
    print(isinstance(fig, go.Figure))  # TypeError!
    print(isinstance(fig, Figure))     # This would work but requires downstream code changes

Expected behavior 🔧
isinstance(fig, go.Figure) should return True even after register_plotly_resampler() has been called, since FigureResampler should be a subclass of go.Figure.

Environment information:

• OS: Windows
• Python environment:
  • Python version: Python 3.13.11
  • plotly-resampler environment: Issue persists both in Python scripts and Jupyter
• plotly-resampler version: 0.11.0

Additional context
Workaround requires importing the private Figure class directly. This forces consumers to either use the private API or modify their validation logic.