### Problem/Motivation Adds edge-case handling for isset()/unset() with nested property access, expands test fixtures for polymorphic matching scenarios, and fixes several rectors to handle real-world patterns like nullsafe property fetches and delegation wrappers. ### Work items - Commit(s): [557419e258](https://github.com/palantirnet/drupal-rector/commit/557419e2582d), [f56c5db267](https://github.com/palantirnet/drupal-rector/commit/f56c5db26793), [ea82e24f31](https://github.com/palantirnet/drupal-rector/commit/ea82e24f3163), [b121d816e7](https://github.com/palantirnet/drupal-rector/commit/b121d816e7fc), [f4a45b1574](https://github.com/palantirnet/drupal-rector/commit/f4a45b1574ea), [bba8bdd7be](https://github.com/palantirnet/drupal-rector/commit/bba8bdd7bed0), [a10865e3cc](https://github.com/palantirnet/drupal-rector/commit/a10865e3cc21), [03d6dfc6f0](https://github.com/palantirnet/drupal-rector/commit/03d6dfc6f08e) ### Credit - Implemented by: @bbrala --- *Filed retroactively as part of the Drupal 12 rector coverage effort. Closed as fixed; credit to be applied to the contributors listed above.* *AI was used extensively to build this fix and to file this issue. See [Dries Buytaert: AI-generated Rector rules for Drupal](https://dri.es/ai-generated-rector-rules-for-drupal) and [Björn Brala: Drupal Rector rules are config, not code. Mostly.](https://www.linkedin.com/pulse/drupal-rector-rules-config-code-mostly-bj%C3%B6rn-brala-vfpwe/).*