Implement source bundle extraction script

[MenesesCarlos29]

Objective: Download all relevant API endpoints for each of the selected sources from the previous task.

Description:
Create a script to download complete raw source bundles for selected SkyPortal sources. For each source, retrieve source details, photometry, photometric statistics, classifications, spectra, comments, annotations, position, offsets, color-magnitude information and associated GCNs when available.

To Do:

• Create the main extraction script.
• Implement loops to hit all relevant endpoints for each selected source.
• Save the raw JSON responses systematically in the output directory.

Expected Outputs:

• Script: scripts/04_dump_source_bundles.py
• Data directory: data/raw/skyportal/source_bundles/