feat: new healthcheck endpoint

[luislhl]

Depends on HathorNetwork/hathor-wallet-lib#579

Acceptance Criteria

• Create a new /health endpoint to return information about the health of the wallets and the connected components (tx-mining-service, hathor-core).

Note: There is an unfinished TODO because we are still developing a new /health endpoint on hathor-core as well. It will be solved in a future PR to use the new endpoint there when it's ready.

Note: The tests are failing because they depend on the wallet-lib changes.

TODO

• Bump the wallet-lib version after its next release

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.

[codecov]

Codecov Report

Attention: 13 lines in your changes are missing coverage. Please review.

Comparison is base (c643c77) 86.93% compared to head (ef44384) 86.93%.

Files	Patch %	Lines
src/helpers/healthcheck.helper.js	62.50%	6 Missing ⚠️
src/services/healthcheck.service.js	83.87%	5 Missing ⚠️
.../controllers/healthcheck/healthcheck.controller.js	94.44%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #348   +/-   ##
=======================================
  Coverage   86.93%   86.93%           
=======================================
  Files          38       42    +4     
  Lines        1561     1653   +92     
  Branches      322      341   +19     
=======================================
+ Hits         1357     1437   +80     
- Misses        182      194   +12     
  Partials       22       22           

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

The base branch was changed.