PostModel maps posts table (id, user_id fk, title, body text,
created_at indexed). EloquentPostRepository: create, find,
findByUserId (desc by created_at), findRecent (limit, desc),
delete - chain via ::query() to keep larastan happy.
FakePostRepository sorts on read (defensive copy each return).
cascade-on-delete on user_id so removing a user nukes their
posts.
phpstan.neon suppresses staticMethod.dynamicCall under
app/*/Eloquent*Repository.php - phpstan-strict-rules flags
Eloquent's fluent builder idiom (Model::query()->orderBy())
because the static methods become instance calls mid-chain.
suppression scoped to repo files only so the rule still
applies elsewhere.
