[BlizzHacker]

What changed

• package catalog/plugins.json inside the rom_hub wheel
• resolve the bundled catalogue relative to the installed Python package
• add a source/install path regression test
• add a CI job that inspects the built wheel and fails if the catalogue is absent or empty

Why

ROMarr's Docker image installs ROM Hub through pip. The previous source-tree-relative path worked in a checkout but pointed outside the installed package, so the Hub was available and confined while its catalogue rendered zero plugins.

Verification

• python -m pytest -q tests/test_catalog_sources.py — 50 passed
• built rom_hub-0.1.0-py3-none-any.whl
• wheel inspection — 22 bundled plugins
• isolated wheel install — 22 plugins, 1 of 1 catalog reachable

Follow-up in BlizzHacker/romarr#10 will repin the Docker image to the merged commit and verify the published container endpoint.