refactoring(logger): better process exit events handling

[rustatian]

Reason for This PR

• errors on process stop when rr stopped.

Description of Changes

• Handle process wait events at the Debug log level instead of Error.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.] [Reviewer TODO: Verify that these criteria are met. Request changes if not]

• [x] All commits in this PR are signed (git commit -s).
• [x] The reason for this PR is clearly provided (issue no. or explanation).
• [x] The description of changes is clear and encompassing.
• [x] Any required documentation changes (code and docs) are included in this PR.
• [x] Any user-facing changes are mentioned in CHANGELOG.md.
• [x] All added/changed functionality is tested.

[codecov[bot]]

Codecov Report

Merging #84 (470c6bd) into master (549d9e0) will decrease coverage by 0.29%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
- Coverage   69.03%   68.74%   -0.30%     
==========================================
  Files         118      118              
  Lines        9967     9969       +2     
==========================================
- Hits         6881     6853      -28     
- Misses       2412     2446      +34     
+ Partials      674      670       -4     

Impacted Files	Coverage Δ
sqs/sqsjobs/config.go	100.00% <ø> (ø)
sqs/sqsjobs/consumer.go	76.58% <ø> (ø)
sqs/sqsjobs/item.go	67.10% <ø> (ø)
sqs/sqsjobs/listener.go	61.70% <ø> (ø)
http/handler/handler.go	82.59% <100.00%> (ø)
server/plugin.go	64.81% <100.00%> (-0.82%)	:arrow_down:
sqs/plugin.go	90.90% <100.00%> (ø)
jobs/listener.go	35.15% <0.00%> (-12.50%)	:arrow_down:
jobs/metrics.go	95.91% <0.00%> (-4.09%)	:arrow_down:
... and 6 more

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