[hasumikin]

Uniform interface: Funicular::Schema derives a model's endpoint table
from the Rails routes to its controller (resources :posts gives
posts#index as "all", posts#show as "find"; other actions keep their
names). Escape hatches: controller:, endpoints: (a "controller#action"
alias, a hand-written entry, or nil to hide one), routes: false, and a
nil model_class. On the client, path placeholders fill from the call
(Comment.all(post_id: 3) -> /posts/3/comments) or the record's
attributes; one unfilled segment takes the id whatever the route calls
it. A missing endpoint or segment raises instead of a silent no-op.

Self-descriptive messages: a 422 with { errors: record.errors } lands
on the record's errors and is yielded as a Funicular::Model::Errors,
like a client-side validation failure.

Cache: a replica model remembers each GET's ETag in the replica
database and sends If-None-Match; a 304 is answered from the replica
rows the last response listed, with no write and no change event.
Replica rows now merge per attribute so summary and detail
representations build one row. Model.absorb seeds the replica from
SSR state.

Version 0.6.0.