fix(examples): Graceful Payload Validation

[refcell]

Description

• Makes payload validation graceful - returning a Result<bool>.
• Rejiggers the pipeline to allow the consumer to peek at attributes for validation. This makes downstream validation easier such that if validation errors, no additional tracking needs to be done to re-try validation.

[refcell]

• fix(examples): Reset Failed Payload Derivation Metric #338
• feat(derive): Frame Count -> Channels Histogram #337
• fix(derive): Pipeline Iterator #334
• feat(derive): Track Current Channel Size #331
• fix(derive): Prefix Metric Names #330
• fix(examples): Graceful Payload Validation #327 👈
• feat(derive): Additional Stage Metrics #326
• feat(derive): Granular Provider Metrics #325
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

Join @refcell and the rest of your teammates on Graphite

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 77.7%. Comparing base (961d4a5) to head (7db86ae).

Files	Patch %	Lines
crates/derive/src/pipeline/core.rs	0.0%	4 Missing ⚠️

Additional details and impacted files

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.