[Access] Unify Event streaming endpoint on the execution data gRPC API

[UlyanaAndrukhiv]

#5557

Context

In this PR :

• implemented separated gRPC calls for event streaming:

  • SubscribeEventsFromStartBlockID,
  • SubscribeEventsFromStartHeight,
  • SubscribeEventsFromLatest

• added the messageIndex to responses,

• created new versions of the backend methods,

• modified functional and integration tests by covering new endpoints.

As part of this PR:

• the protobuf has been extended ([Access] Event streaming endpoints flow#1441),
• flow-emulator has been extended ([Access] Unify Event streaming endpoint on the execution data gRPC API flow-emulator#625).

In this PR, a bug with missing block timestamps in event responses has been fixed (#4911).

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 41.95402% with 101 lines in your changes are missing coverage. Please review.

Project coverage is 55.59%. Comparing base (1aab1ef) to head (d0b6949).

Files	Patch %	Lines
engine/access/state_stream/backend/handler.go	32.53%	53 Missing and 3 partials ⚠️
...gine/access/subscription/execution_data_tracker.go	0.00%	19 Missing ⚠️
engine/access/subscription/subscribe_handler.go	0.00%	13 Missing ⚠️
...ine/access/state_stream/backend/event_retriever.go	28.57%	8 Missing and 2 partials ⚠️
...gine/access/state_stream/backend/backend_events.go	85.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5602      +/-   ##
==========================================
- Coverage   55.66%   55.59%   -0.07%     
==========================================
  Files        1041     1042       +1     
  Lines      101935   102002      +67     
==========================================
- Hits        56741    56708      -33     
- Misses      40839    40934      +95     
- Partials     4355     4360       +5     

Flag	Coverage Δ
unittests	55.59% <41.95%> (-0.07%)	⬇️

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[peterargue]

not finished my review, but here's some early feedback. overall I this is looking good so far

[UlyanaAndrukhiv]

@peterargue, thank you for your feedback. I have updated the pull request accordingly.

I would greatly appreciate your guidance on how to address the situation where added the 'deprecated' option to the rpc call and utilized this call in tests, as it has now caused the lint process to fail in the integration test with SA1019 staticcheck

[peterargue]

@peterargue, thank you for your feedback. I have updated the pull request accordingly.

I would greatly appreciate your guidance on how to address the situation where added the 'deprecated' option to the rpc call and utilized this call in tests, as it has now caused the lint process to fail in the integration test with SA1019 staticcheck

does nolint work to suppress it?

[code that causes failure] //nolint: staticcheck

[peterargue]

added a few small comments, but otherwise this looks good.

[peterargue]

can you include MessageIndex here as well?

[UlyanaAndrukhiv]

Currently, MessageIndex tracking has been relocated to the handler, so it isn't directly accessible here in the backend.

[Guitarheroua]

Looks good for me.