Use new error type & log in channel GetPayChInfo

[anagha-ks]

Description

For GetPayChInfo API:

• Update it to return the newly defined error type (#132)
• Log the request, error/success response are logged in a structured format (#133)

Category

Implementation Task

Relevant issue

Relates to #132, #133

Testing

Steps to run the tests

1. All exiting tests should pass

Checklist

• [x] Name is added to the NOTICE file, if it is not present already.
• [x] Changes are rebased onto the target branch.

[manoranjith]

Could you rebase it to latest develop.

[manoranjith]

Rebased it to latest develop