Make DQ heartbeat (check connection) optional with default False

[Magnus167]

No description provided.

[codecov-commenter]

Codecov Report

Base: 60.56% // Head: 60.53% // Decreases project coverage by -0.02% ⚠️

Coverage data is based on head (cfadace) compared to base (6ec5f1c).
Patch coverage: 16.66% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #605      +/-   ##
===========================================
- Coverage    60.56%   60.53%   -0.03%     
===========================================
  Files           26       26              
  Lines         2815     2818       +3     
===========================================
+ Hits          1705     1706       +1     
- Misses        1110     1112       +2     

Impacted Files	Coverage Δ
macrosynergy/dataquery/api.py	41.55% <16.66%> (-0.09%)	⬇️

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