Unable to include hidden files

### Affected version

1.2.0

### Bug description

Hidden files are excluded from the cache even when explicitly matched by a glob pattern. This prevents important files such as .npmrc, .env, .dockerignore, etc., from being cached, leading to inconsistent builds.

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Start by locating the cache include-glob handling for patterns such as {*,.*}, then reproduce the issue with an explicitly matched hidden file like .npmrc, .env, or .dockerignore. Done means explicitly matched hidden files are included in the cache and the regression is covered by a test.

Written by the indexing model from the issue text.