Update margin cache catalog info parameters

[camposandro]

Adds the catalog specific metadata ("epoch", "ra" and "dec") to the margin catalog info output. Closes #331.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.78%. Comparing base (3b2c3ae) to head (87ecd85).
Report is 45 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #332   +/-   ##
=======================================
  Coverage   99.78%   99.78%           
=======================================
  Files          26       26           
  Lines        1389     1389           
=======================================
  Hits         1386     1386           
  Misses          3        3           

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