feat: enable metric health bands

[jake-bassett]

Description

Added configuration for cartesian health bands to overview and metric dashboards. Turned off by default.

[codecov]

Codecov Report

Merging #603 (a738259) into main (cda2439) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #603      +/-   ##
==========================================
+ Coverage   85.08%   85.15%   +0.06%     
==========================================
  Files         768      768              
  Lines       15856    15856              
  Branches     2036     2036              
==========================================
+ Hits        13491    13502      +11     
+ Misses       2332     2321      -11     
  Partials       33       33              

Impacted Files	Coverage Δ
...s/apis/api-detail/metrics/api-metrics.dashboard.ts	100.00% <ø> (ø)
...apis/api-detail/overview/api-overview.dashboard.ts	100.00% <ø> (ø)
...ervice-detail/metrics/service-metrics.dashboard.ts	100.00% <ø> (ø)
...vice-detail/overview/service-overview.dashboard.ts	100.00% <ø> (ø)
...s/apis/api-detail/metrics/api-metrics.component.ts	100.00% <100.00%> (ø)
...ages/apis/api-detail/metrics/api-metrics.module.ts	100.00% <100.00%> (ø)
...ervice-detail/metrics/service-metrics.component.ts	100.00% <100.00%> (ø)
projects/observability/src/public-api.ts	100.00% <100.00%> (ø)
.../charts/cartesian-widget/cartesian-widget.model.ts	72.61% <100.00%> (ø)
.../selections/observability-specification-builder.ts	64.21% <0.00%> (+5.26%)	⬆️
... and 2 more

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[github-actions]

Unit Test Results

    4 files  ±0  235 suites  ±0   13m 59s ⏱️ -48s
844 tests ±0  844 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
848 runs  ±0  848 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit a11d1c7. ± Comparison against base commit cda2439.