Write Script to plot amplification curves for the "groups" identified in analysis.

Should be able to plot the follow data for a given processing stage (Raw, Normalized, Second Derivative & Modulated)

- [x] Fixed Baseline Samples
- [x] Single Point Normalized Samples
- [x] Weak Amplification Samples
- [x] "Unassigned" Samples

The script needs to plot amplification curves for groups like 'Fixed Baseline Samples' across processing stages (Raw, Normalized, etc.). Look for existing data loading and plotting code in the repository, likely in Jupyter notebooks. Identify where group data is stored and how to access different processing stages. The output should be a script that generates these visualizations, and 'done' means it plots all specified sample groups for each stage.

Written by the indexing model from the issue text.