List Core key metadata for an Accounts-authorized workspace

Disabled until the dedicated Accounts service credential is configured. Accounts authorizes current owner/admin membership and Commerce access, then signs a command bound to its exact organization, workspace, user, environment and protocol purpose. Core requires a synchronized existing workspace projection, verifies the signature through the configured Accounts JWKS and checks authorization expiry after lock waits. Commands expire within 60 seconds; issued_at may be at most 5 seconds ahead. command_id is globally immutable across actors, workspaces and actions; only authorization timestamps may change on retry. JSON only, no query parameters, cookies or Origin header. This creates no native platform connection and grants no ERP execution authority. Returns at most 100 Accounts-provisioned credentials with a truncation indicator. Metadata contains no raw key or provider secret. Legacy connector credentials are outside this namespace.