## Why
Daemon package tests copy full debug CLI packages. Running these I/O-heavy cases alongside other tests can increase shared-disk writeback pressure.
## What changed
- Move package installation and replacement coverage into the `app_server_daemon_package` test binary, sharing daemon fixtures with the lifecycle tests.
- Reserve all nextest test threads for each package test and add an exclusive Bazel target that runs the cases serially on Linux and macOS.
- Hard-link the prepared fixture executable during package setup, while retaining real independent package copies in the installer.
GitOrigin-RevId: 255ac8caf75d9eb61bafe68f1f9bcfa99ee72484
