fix CDIPS parsing support (column filled with strings)

[kecnry]

which affected CDIPS HLSP light curves and prevented them from being loaded into lcviz. Note that the time format is still incorrect, but that is a separate issue.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 91.15%. Comparing base (7b78df5) to head (b547ad6).
Report is 35 commits behind head on main.

Files with missing lines	Patch %	Lines
lcviz/utils.py	33.33%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #122      +/-   ##
==========================================
- Coverage   93.92%   91.15%   -2.78%     
==========================================
  Files          37       41       +4     
  Lines        1598     2058     +460     
==========================================
+ Hits         1501     1876     +375     
- Misses         97      182      +85     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[bmorris3]

Simple enough fix, and I checked that it works for me by running:

from lcviz import LCviz
from astroquery.mast import Observations

ticid = '210400528'
obs_table = Observations.query_criteria(target_name=ticid, provenance_name="CDIPS")
print("Found " + str(len(obs_table)) + " CDIPS light curves.")

# Get list of available products for this Observation.
cdips_products = Observations.get_product_list(obs_table)

manifest = Observations.download_products(cdips_products)

lcviz = LCviz()

for path in manifest['Local Path']:
    lcviz.load_data(path)

lcviz.show()

It raises lots of warnings about the units of many columns, but I'm pretty sure that's on the astropy Tables+this data product, and not on LCviz.