Axel PASCON 55952a3c61 fully fixes #15445
changes summary :
	- change the `pkg_id` field of `struct SerializedUnit<'a>` to be `PackageIdSpec` instead of `PackageId`
	- change the unit-graph testcases to match the changes

(cleaning previous commits so every commit passes CI checks, as required)
2025-04-23 13:19:45 +02:00
..
2025-04-23 13:19:45 +02:00