CDM-452: Add basic refdata recovery endpoint

[MrCreosote]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 40.00000% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.64%. Comparing base (b2f0267) to head (bee4ee6).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
cdmtaskservice/refdata.py	23.07%	10 Missing ⚠️
cdmtaskservice/routes.py	33.33%	4 Missing ⚠️
cdmtaskservice/mongo.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #517      +/-   ##
==========================================
- Coverage   53.70%   53.64%   -0.06%     
==========================================
  Files          68       68              
  Lines        5739     5762      +23     
==========================================
+ Hits         3082     3091       +9     
- Misses       2657     2671      +14     

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