Add redaction support to encoder and change SkunkException to use it

[mpilquist]

Adds support for both encoder level redaction (e.g., int4.redacted ~ int4) as well as session level overrides (via redactionStrategy = RedactionStrategy.All or RedactionStrategy.None).

Some libraries default to redacting all encoded values but in this PR, we default to respecting individual encoder redaction.

This PR also updates the test infrastructure to trace all database tests (using a new top level span per test).

[codecov-commenter]

Codecov Report

Merging #900 (10cf3d6) into main (9ac10b7) will decrease coverage by 0.22%.
The diff coverage is 82.35%.

@@            Coverage Diff             @@
##             main     #900      +/-   ##
==========================================
- Coverage   83.90%   83.68%   -0.22%     
==========================================
  Files         125      127       +2     
  Lines        1758     1790      +32     
  Branches      212      171      -41     
==========================================
+ Hits         1475     1498      +23     
- Misses        283      292       +9     

Impacted Files	Coverage Δ
...les/core/shared/src/main/scala/PreparedQuery.scala	32.07% <0.00%> (ø)
...red/src/main/scala/exception/DecodeException.scala	100.00% <ø> (ø)
.../main/scala/exception/PostgresErrorException.scala	97.05% <ø> (ø)
...re/shared/src/main/scala/net/BitVectorSocket.scala	100.00% <ø> (ø)
...core/shared/src/main/scala/net/protocol/Bind.scala	100.00% <ø> (ø)
...e/shared/src/main/scala/net/protocol/Execute.scala	100.00% <ø> (ø)
...ore/shared/src/main/scala/net/protocol/Query.scala	100.00% <ø> (ø)
...core/shared/src/main/scala/RedactionStrategy.scala	33.33% <33.33%> (ø)
...ared/src/main/scala/exception/SkunkException.scala	72.50% <33.33%> (ø)
modules/core/shared/src/main/scala/Encoder.scala	84.21% <76.47%> (-9.13%)	⬇️
... and 7 more

[tpolecat]

I think this is going to work well. Thanks!

[mpilquist]

This one is ready for review.