🎨 Check organism parameter type in curator

[Zethson]

Fixes #2293

Now ensuring that people don't pass Organism to organism of any Curator but an actual str (the Organism name)

I am generally pretty unhappy about the fact that the Curator takes organism str but some other functions require an actual Organism and do not take str. It's inconsistent.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.86%. Comparing base (2a17099) to head (fb14c5c).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2297      +/-   ##
==========================================
+ Coverage   92.82%   92.86%   +0.04%     
==========================================
  Files          55       55              
  Lines        7202     7216      +14     
==========================================
+ Hits         6685     6701      +16     
+ Misses        517      515       -2     

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