SMQ-2761 - Add route field to channels

[felixgateru]

What type of PR is this?

This is a feature as it adds a route field to channels.

What does this do?

• Introduces route attribute for channels
• Updates relevent repository, service and api methods for this addition
• Updates documentation and tests

Which issue(s) does this PR fix/relate to?

• Resolves Add topic field to channels #2761

Have you included tests for your changes?

Yes, tests have been added for my changes.

Did you document any new/modified feature?

Yes, api documentation has been updated for the change

Notes

[codecov]

Codecov Report

Attention: Patch coverage is 41.74757% with 60 lines in your changes missing coverage. Please review.

Project coverage is 31.11%. Comparing base (62f4599) to head (4967efe).

Files with missing lines	Patch %	Lines
channels/mocks/repository.go	0.00%	34 Missing ⚠️
channels/postgres/channels.go	66.66%	11 Missing and 2 partials ⚠️
channels/events/events.go	0.00%	7 Missing ⚠️
channels/api/http/requests.go	50.00%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2772      +/-   ##
==========================================
+ Coverage   27.52%   31.11%   +3.58%     
==========================================
  Files         351       65     -286     
  Lines       55423    15281   -40142     
==========================================
- Hits        15257     4755   -10502     
+ Misses      39415    10273   -29142     
+ Partials      751      253     -498     

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[dborovcanin]

@felixgateru Please rebase.