* feat(harmony): disclose the unread pkgContextInfo.json declaration
A package that ships pkgContextInfo.json shows the entry in
unclassified_components, yet nothing said its isSO declarations were
skipped: bridge_candidates came only from the libs/<abi>/lib<name>.so
path rule. State that gap in limitations when the entry is inventoried,
so a path-convention hypothesis is not read as a package declaration.
The declaration-parsing half of #4489 needs a decision about who owns
reading inventoried file content; this projection receives identity and
digests only, and the shared inventory carrier guard rejects other
Evidence. No content is parsed here.
* test(harmony): assert the disclosure by its names, not its sentence
docs/testing.md requires asserting structured facts instead of freezing an
explanatory sentence, and says a replaced prose assertion must still pass on a
harmless wording change while failing when the fact is lost. The first version of
this test compared the whole limitation string verbatim, so any rewording of the
disclosure would have failed CI.
The assertions now require exactly one limitation naming pkgContextInfo.json,
carrying bridge_candidates, isSO, and the not-read/not-narrowed fact, and keep the
structural claim that the same package without the declaration file yields
identical bridge candidates and no such limitation.