[czj]

A trail class can turn off derived trails with derive_trails false, and a derived level labels a record without its own to_s "Invoice 12" instead of #<Invoice:0x…>.

New

• derive_trails false in a trail class, for apps that want only the trails they write, as with gretel: a view without a breadcrumb call gets an empty breadcrumb_trail and a nil breadcrumb_json_ld. Subclasses inherit it and derive_trails true turns it back on. In such a class, Crumbly.verify! reports a crumb that only a derived trail would read as unused, and Crumbly::Oracle.redundant_calls lists nothing.

Fixed

• A derived level whose record's model doesn't define to_s is labelled with the translated model name and id, "Invoice 12", instead of Ruby's #<Invoice:0x000…>. A model's own to_s still wins.

Once merged, bin/release tags the merge commit v2.2.0, which publishes the gem.