[dajiaohuang]

🔍 What was changed

Match registered collection types with is_a(..., true) so both the registered base type itself and subclasses resolve to the collection factory. Preserve alias precedence, factory class customization and the fallback for explicit factory names.

🤔 Why?

Fixes #573. Using Doctrine\Common\Collections\Collection::class as the relation collection type currently attempts to autowire the interface, although DoctrineCollectionFactory::withCollectionClass() explicitly supports it. Using the registered Illuminate base class also falls through to the container and returns a collection instead of a collection factory.

📝 Checklist

• Real relation-loading regressions for eager and lazy Doctrine interface / Illuminate base class selection.
• All four new cases fail on the base (two interface autowiring exceptions, two return-type errors) and pass with this change.
• Existing default, alias and custom subclass cases retained.
• Unit suite: 383 tests / 1,211 assertions passed.
• Combined independent collection/typecast fixes: SQLite suite 1,321 tests / 30,354 assertions, 10 upstream skips / 3 incomplete unchanged.
• Composer validate --strict; changed-file style; git diff --check.

Local runtime: PHP 8.3.35, cycle/database 2.23.3, doctrine/collections 2.6.0, illuminate/collections 12.70.0. Other PHP versions and database drivers were not run. Psalm has 12 errors on the base, including the unrelated callable-typecast issue; no new collection-path diagnostic remains. No static-analysis suppressions were added.

📃 Documentation

This restores registered-base collection selection without changing the public API.