Static cache invalidation strips trailing slashes from rules

[jackmcdade]

Bug description

When trailing slashes are enforced (URL::enforceTrailingSlashes()), custom invalidation rules with trailing slashes don't clear the cache.

Example config:

'collections' => [
    'events' => [
        'urls' => [
            '/events/',
            '/annual-meeting/',
        ],
    ],
],

It seems DefaultInvalidator tidies relative rules with withTrailingSlash: false, so /events/ becomes /events. Invalidation then does an exact match against the URL index, which stores the request path (e.g. /events/).

Relevant code:

// src/StaticCaching/DefaultInvalidator.php
->map(fn (string $rule) => URL::tidy($entry->site()->url().'/'.$rule, withTrailingSlash: false))

Note: DefaultUrlExcluder already normalizes via URL::tidy() on both sides, so exclusions handle this correctly — invalidation probably should too.

How to reproduce

1. Enable trailing slashes
2. Enable static caching
3. Add invalidation rules like above for a collection
4. Cache pages that use those URLs (e.g. pages with a collection tag pulling event data)
5. Edit an entry in the events collection
6. Cached pages at /events/ and /annual-meeting/ are not invalidated