API for Challenge Timing Details

[avanaur]

Changes

Add API to serve the challenge timings history.
This will be used for chart visualisation during load test and potentially on blobber page as a table

Fixes

Tests

Tasks to complete before merging PR:

• Ensure system tests are passing. If not Run them manually to check for any regressions 📋
• Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• 0chain:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #833 (f277e3b) into staging (02f3d99) will decrease coverage by 0.14%.
The diff coverage is 1.88%.

@@             Coverage Diff             @@
##           staging     #833      +/-   ##
===========================================
- Coverage    24.28%   24.13%   -0.15%     
===========================================
  Files           80       82       +2     
  Lines         8108     8161      +53     
===========================================
+ Hits          1969     1970       +1     
- Misses        5861     5913      +52     
  Partials       278      278              

Flag	Coverage Δ
Unit-Tests	24.13% <1.88%> (-0.15%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...chain.net/blobbercore/handler/challenge_timings.go	0.00% <0.00%> (ø)
code/go/0chain.net/core/common/pagination.go	0.00% <0.00%> (ø)
code/go/0chain.net/blobbercore/handler/handler.go	56.80% <100.00%> (+0.10%)	⬆️

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[service-0chain]

Manual system tests [success] with the following config

config	value
tests skipped	TRUE
system-tests	master
gosdk	NOT OVERRIDDEN
zboxcli	staging
zwalletcli	staging
0chain	staging
blobber	staging
authorizer	staging
0box	staging
0block	staging
0dns	staging
explorer	master
0proxy	staging
0search	staging