fix: subscriptions historical filtering

[EnriqueL8]

Proposed changes

The subscriptions/<id>/events API is really useful to find all the events that match your subscription.

Unfortunately there was an assumption made in the code when filtering for historical events that the subscription wouldn't have a protocol. Subscriptions always have a protocol. It then set it to Websocket but there are some options that are valid for Webhooks and not Websocket so the validation would fail.

There is no need to set a default protocol, just use the one given.

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Types of changes

• Bug fix
• New feature added
• Documentation Update

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Please make sure to follow these points

• I have read the contributing guidelines.
• I have performed a self-review of my own code or work.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generates no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• My changes have sufficient code coverage (unit, integration, e2e tests).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.95%. Comparing base (3e30421) to head (a8a314f).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1674      +/-   ##
==========================================
- Coverage   99.95%   99.95%   -0.01%     
==========================================
  Files         339      339              
  Lines       29782    29780       -2     
==========================================
- Hits        29770    29768       -2     
  Misses          8        8              
  Partials        4        4              

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