Eric Rakestraw a6c133319a feat(feedkit): add optional normalization hook and document external API ...

Introduce an optional normalization stage for feedkit pipelines via the new
normalize package. This adds:

- normalize.Normalizer interface with flexible Match() semantics
- normalize.Registry for ordered normalizer selection (first match wins)
- normalize.Processor adapter implementing pipeline.Processor
- Pass-through behavior when no normalizer matches (normalization is optional)
- Func helper for ergonomic normalizer definitions

Update root doc.go to fully document the normalization model, its role in the
pipeline, recommended conventions (Schema-based matching, raw vs normalized
events), and concrete wiring examples. The documentation now serves as a
complete external-facing API specification for downstream daemons such as
weatherfeeder.

This change preserves feedkit’s non-framework philosophy while enabling a
clean separation between data collection and domain normalization.

2026-01-13 18:23:43 -06:00

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