* fix(packaging): derive the Flatpak and AUR dependency sets from the lock
* test(packaging): add return annotations on new packaging tests
Greptile asked for -> None on the new tests, matching AGENTS.md.
* test(packaging): type parametrized Flatpak source arguments
Greptile asked for type hints on the source parameter, matching AGENTS.md.
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Co-authored-by: jatinkrmalik <jatinkrmalik@gmail.com>
