The .NET realization of the two-level validation model (see the `ddd` skill for the principles). Use when working with validation in Jorge's .NET code: writing or reviewing FluentValidation validators, value objects and their From/Create factories, aggregate factories, request validators, deciding where a rule lives (type invariant vs use-case precondition), wiring validators into DI, mapping validation failures to ProblemDetails, or implementing uniqueness/existence checks. It encodes: the three-verb creation surface (ctor hydrates, From converts, Create validates), per-call validators assembled with static Create() chains, the factory-vs-DI rule, the aggregate compositi…
