[Access] Heartbeat interval not reset correctly in streaming endpoints.

[AndriiDiachuk]

Closes: #6837

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 41.07%. Comparing base (ce0396a) to head (1554d01).

Files with missing lines	Patch %	Lines
engine/access/state_stream/backend/handler.go	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6848   +/-   ##
=======================================
  Coverage   41.07%   41.07%           
=======================================
  Files        2120     2120           
  Lines      185958   185968   +10     
=======================================
+ Hits        76384    76393    +9     
  Misses     103156   103156           
- Partials     6418     6419    +1     

Flag	Coverage Δ
unittests	41.07% <80.00%> (+<0.01%)	⬆️

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[peterargue]

this looks good, but double check that test failure.

[Guitarheroua]

If changes from this PR will be backported to v0.37, the flow-sdk should be definitely checked for issues