chore: Use structured logging

[bstasyszyn]

Convert all logs to structured logs where data is logged as key-value pairs.

closes #130

Signed-off-by: Bob Stasyszyn Bob.Stasyszyn@securekey.com

[codecov-commenter]

Codecov Report

Base: 85.48% // Head: 85.61% // Increases project coverage by +0.13% 🎉

Coverage data is based on head (e1012e2) compared to base (8b6a133).
Patch coverage: 88.07% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
+ Coverage   85.48%   85.61%   +0.13%     
==========================================
  Files          20       22       +2     
  Lines        2680     2726      +46     
==========================================
+ Hits         2291     2334      +43     
- Misses        228      231       +3     
  Partials      161      161              

Impacted Files	Coverage Δ
pkg/controller/rest/operation.go	85.71% <0.00%> (ø)
cmd/vct/startcmd/start.go	82.92% <10.00%> (-0.44%)	⬇️
internal/pkg/log/logger.go	96.47% <96.66%> (+0.19%)	⬆️
internal/pkg/log/common.go	100.00% <100.00%> (ø)
internal/pkg/log/fields.go	100.00% <100.00%> (ø)
internal/pkg/tlsutil/certpool.go	82.60% <100.00%> (ø)
pkg/storage/postgres/log_storage.go	82.44% <100.00%> (ø)
pkg/storage/postgres/provider.go	89.47% <100.00%> (ø)

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