### Problem/Motivation Consolidates rector-authoring infrastructure by adding setup-repos.sh for local cloning, updating Claude skills with proper path resolution, and introducing rector-index discovery with change-record citation mapping. Adds PHPStan coverage registry tooling to track normalized deprecation messages for future upgrade_status integration. ### Work items - Commit(s): [283861164f](https://github.com/palantirnet/drupal-rector/commit/283861164f3c), [6662a0336b](https://github.com/palantirnet/drupal-rector/commit/6662a0336bf4), [742ea3c6bf](https://github.com/palantirnet/drupal-rector/commit/742ea3c6bffe), [962c6a551f](https://github.com/palantirnet/drupal-rector/commit/962c6a551f4b), [ae5bec3df3](https://github.com/palantirnet/drupal-rector/commit/ae5bec3df388), [cc30b4ab48](https://github.com/palantirnet/drupal-rector/commit/cc30b4ab4828), [dfe2577f13](https://github.com/palantirnet/drupal-rector/commit/dfe2577f1387), [f56287c5db](https://github.com/palantirnet/drupal-rector/commit/f56287c5dbac), [0f702a4a7d](https://github.com/palantirnet/drupal-rector/commit/0f702a4a7df7), [c9dc75003f](https://github.com/palantirnet/drupal-rector/commit/c9dc75003f29), [78dc8038e2](https://github.com/palantirnet/drupal-rector/commit/78dc8038e21d), [7d78fc8d73](https://github.com/palantirnet/drupal-rector/commit/7d78fc8d7325) ### 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 change 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/).*