Update to CSV database

[znicholls]

Description

Closes #58

Checklist

Please confirm that this pull request has done the following:

• Tests added
• Documentation added (where applicable)
• Changelog item added to changelog/
• pushed tomli-w requirement back upstream

[codecov]

Codecov Report

❌ Patch coverage is 73.17073% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.38%. Comparing base (217be88) to head (61db370).
⚠️ Report is 15 commits behind head on main.

Files with missing lines	Patch %	Lines
src/gcages/ar6/infilling.py	28.57%	5 Missing ⚠️
src/gcages/cmip7_scenariomip/scm_running.py	0.00%	2 Missing ⚠️
src/gcages/ar6/harmonisation.py	0.00%	1 Missing ⚠️
src/gcages/ar6/pre_processing.py	66.66%	1 Missing ⚠️
src/gcages/ar6/scm_running.py	0.00%	1 Missing ⚠️
src/gcages/cmip7_scenariomip/infilling.py	85.71%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (217be88) and HEAD (61db370). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (217be88)	HEAD (61db370)
	7	6

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #64       +/-   ##
===========================================
- Coverage   81.72%   71.38%   -10.34%     
===========================================
  Files          32       38        +6     
  Lines        1335     1828      +493     
  Branches      125      176       +51     
===========================================
+ Hits         1091     1305      +214     
- Misses        209      488      +279     
  Partials       35       35               

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