chore(istio-metadata): make schema compatible with new format - #666
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Interface schemas no longer wrap their models in the `ProviderSchema` and `RequirerSchema` classes from `pytest-interface-tester`. Instead a schema names all four databags directly, as `ProviderAppData`, `ProviderUnitData`, `RequirerAppData` and `RequirerUnitData`, setting a databag that is always empty to `None`. Naming all four makes an empty databag a deliberate choice a reviewer can see, and makes a misspelled name an error rather than a silently empty databag. The models are unchanged; only the wrapper classes around them are gone. Dropping the `pytest-interface-tester` import leaves Pydantic as the only dependency needed to read a schema. `IstioMetadataAppData` is part of the library's public API, so it is aliased rather than renamed. A follow-up PR documents the format and adds a CI check for it, once every interface has been migrated. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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The new interface schema format requires four names to all be provided:
ProviderAppData,ProviderUnitData,RequirerAppDataandRequirerUnitData, setting a databag that is always empty toNone. This PR adds these four names to the existing schema -- allNoneexcept forProviderAppData, which is an alias forIstioMetadataAppData.These names are for consumption by the charmlibs repo machinery, not for library users, so they aren't exported publicly from the library.
A follow up PR will document this new format and add tooling to enforce it, after similar PRs have landed for all the other
CODEOWNERSin this repository.