0.13.1: lupdate names the .ts it rewrites as its output instead of claiming the file's directory

[speak-agent]

rules-qt ran lupdate (translations::update_sources) as a prepare action whose output directory was the .ts file's directory. A project that keeps its .ts in the package root, as GalTranslPP does, therefore declared its whole source directory as a construction output. mcpp 2026.9.26.2 reports this for every file the build program watches ("build.mcpp re-runs on … which is inside …, the directory package … declared with a prepare action's output_dir"), measured on Sunrisepeak/GalTranslPP#2.

lupdate writes one file whose name is known when the build program runs. It is therefore an action that names that file as its output (SPEC-007 R3.2): no stamp and no directory. lrelease takes the same file as its input, which orders the two.

• tests/qt-consumer keeps its .ts in the package root and turns update_sources on. The committed file is lupdate's own output, so a build leaves it unchanged.
• New criteria: lupdate runs before lrelease, the build reports no construction directory over the package's sources, and a second build runs neither tool. Against 0.13.0's rule the second criterion fails with the warning above; with this change all three hold.
• The roles of the rule's other actions are written as mcpp::roles::source (SPEC-007 R3.6).

The engine floor does not move: mcpp 2026.9.26.2.