Replace _raw_get_items raw-httpx workaround with the typed 0.6.0 client

[bburda]

Summary

SovdClient._raw_get_items is a raw-httpx helper used for the query-param-filtered list calls (entity/global faults, logs, updates). It originally existed because the 0.5.0 generated client did not type those query params. The 0.6.0 client now types them, so the helper is no longer required for that reason - but the generated functions type the filters as per-endpoint enums, so a clean swap is non-trivial.

Proposed solution

Replace the four _raw_get_items call sites with the typed generated client functions and then remove _raw_get_items (and _fault_query_params if it becomes unused):

• entity faults list -> list_<entity>_faults (status)
• global faults list -> list_all_faults (status / include_muted / include_clusters)
• entity logs list -> list_<entity>_logs (severity / context)
• updates list -> list_updates (origin / target_version)

Map the string filters to the per-endpoint enums (ListComponentFaultsStatus, ListComponentLogsSeverity, etc.).

Additional context

• Behavior change to decide on: the generated filter params are enums, so an out-of-enum filter string would raise locally instead of being passed through to the gateway. Choose between validating (enum) or keeping the lenient pass-through.
• updates (origin / target_version) and logs context are plain strings (no enum) and convert trivially; only faults status and logs severity need per-entity-type enum mapping.
• Deferred from the 0.6.0 client migration (Migrate to gateway 0.6.0 client #20) to keep that PR a focused version bump. The stale workaround comments were already corrected there.