agent discovery

[nqd]

1. create proto contract
2. implement heartbeat at agent side

Not in this PR:

• handler at master

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (v2@ee738e3). Click here to learn what that means.
Patch has no changes to coverable lines.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

Additional details and impacted files

@@          Coverage Diff          @@
##             v2     #187   +/-   ##
=====================================
  Coverage      ?   44.63%           
=====================================
  Files         ?       23           
  Lines         ?     1752           
  Branches      ?        0           
=====================================
  Hits          ?      782           
  Misses        ?      882           
  Partials      ?       88           

Flag	Coverage Δ
unittests	44.63% <0.00%> (?)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[nguyencatpham]

Should I add a Github issue to implement it?

[nguyencatpham]

I believe we will have unit tests for another merge request so that we can run the test.