PackImporter now runs a second pass over pack-stubs.json, inserting
PackConfigEntry placeholders for any pack_id NOT already present from
the live-capture packs.json pass. Synthesized stubs default
IsEnabled=false; live-capture rows default IsEnabled=true.
PackRepository.GetActivePacks filters by IsEnabled in addition to the
date window, so synthesized stubs stay hidden until an operator opts
them in (UPDATE Packs SET IsEnabled=true WHERE Id=...).
Bundles Task 6 + Task 11 because adding pack-stubs.json to the
test-fixture set surfaces an extra row in PackControllerFullCatalogTests'
35-pack count assertion; the filter is what makes the test resilient.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
