[SunPy] Modernizing Radiospectra - Tejas Shivaji Narwade

[narwadetejas]

Requirements

• I confirm that the technical content and project plan are my work. (Assisted by Gemini AI for language polishing and diagram generation);
• I've introduced myself to the sub-organisation I'm applying for;
• I've read OA contributor application guide;
• I've created a blog post and wrote something about the project I'm interested: [LINK TO YOUR BLOG HERE];
• I've contributed at least one patch to the sub-organisation:
  • Improve metadata handling in spectrogram sources and add safety tests sunpy/radiospectra#178
  • Add test for missing instrument metadata in RPWSpectrogram sunpy/radiospectra#177
  • Improve robustness by safely accessing metadata using dict.get sunpy/radiospectra#175
  • Fix doctest failure by skipping optional dependency sunpy_soar sunpy/radiospectra#174

Description

This proposal aims to modernize radiospectra by implementing WCS-aware data structures and an enhanced background subtraction API.

Cc: @samaloney @hayesla