core: Continue PieCrust3 refactor, simplify pages. The asset pipeline is still the only function pipeline at this point. * No more `QualifiedPage`, and several other pieces of code deleted. * Data providers are simpler and more focused. For instance, the page iterator doesn't try to support other types of items. * Route parameters are proper known source metadata to remove the confusion between the two. * Make the baker and pipeline more correctly manage records and record histories. * Add support for record collapsing and deleting stale outputs in the asset pipeline.

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title: PieCrust System Messages
---

Here are the **PieCrust** system message pages:

* [Requirements Not Met]({{ pcurl('requirements') }})
* [Error]({{ pcurl('error') }})
* [Not Found]({{ pcurl('error404') }})
* [Critical Error]({{ pcurl('critical') }})

This very page you're reading, however, is only here for convenience.