divide agent errors for QBG and Faiss implementation

[kpango]

Signed-off-by: kpango kpango@vdaas.org

Description:

SSIA

Related Issue:

Versions:

• Go Version: 1.19.4
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 2.0.9

Checklist:

• I have read the CONTRIBUTING document and completed our CLA agreement.
• I have checked open Pull Requests for the similar feature or fixes?

Special notes for your reviewer:

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[sonatype-lift]

godot: Comment should end in a period

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[codecov]

Codecov Report

Base: 50.23% // Head: 29.99% // Decreases project coverage by -20.25% ⚠️

Coverage data is based on head (4d524a7) compared to base (97eed29).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1924       +/-   ##
===========================================
- Coverage   50.23%   29.99%   -20.25%     
===========================================
  Files         231      366      +135     
  Lines       13464    33704    +20240     
===========================================
+ Hits         6764    10109     +3345     
- Misses       6499    23188    +16689     
- Partials      201      407      +206     

Impacted Files	Coverage Δ
cmd/agent/core/ngt/main.go	0.00% <ø> (ø)
cmd/agent/sidecar/main.go	0.00% <ø> (ø)
cmd/discoverer/k8s/main.go	0.00% <ø> (ø)
cmd/gateway/filter/main.go	0.00% <ø> (ø)
cmd/gateway/lb/main.go	0.00% <ø> (ø)
cmd/manager/index/main.go	0.00% <ø> (ø)
cmd/tools/cli/loadtest/main.go	0.00% <ø> (ø)
cmd/tools/cli/vdctl/main.go	0.00% <ø> (ø)
internal/observability/metrics/info/info.go	0.00% <0.00%> (-100.00%)	⬇️
internal/errors/vald.go	50.00% <0.00%> (-16.67%)	⬇️
... and 260 more

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[github-actions]

🚫 [golangci] _{reported by reviewdog 🐶}
Comment should end in a period (godot)

[cloudflare-pages]

Deploying with    Cloudflare Pages

Latest commit:	4d524a7
Status:	✅  Deploy successful!
Preview URL:	https://66606658.vald.pages.dev
Branch Preview URL:	https://refactor-internal-errors-div.vald.pages.dev

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[hlts2]

LGTM