[BUG] Improve NASA Power Caching

[rohansaw]

Describe the bug

Currently, our implementation of caching NASA Power data uses a grid of 0.5 x 0.625 degrees. However, while meteorological data is available in a grid of 0.5 x 0.625 degrees resolution, the solar parameters are available in a grid of 1x1 degrees. This possibly causes misalignment and needs to be fixed.

Steps to reproduce

See implementation in met_data/fetch_nasapower.py:get_grid_aligned_coordinates( ).

Expected behavior

No response

Screenshots or logs

No response

Additional context

No response

[rohansaw]

Currently reverting to cache by absolute lat/lon instead of grid-aligned lat/lon to avoid wrong values. Needs to be revisited.