Bounded signature-base errors, without supplied bytes or partial output.

Reasons:

• Input: :invalid_message, :invalid_options, :invalid_signature_parameters, :limit (documented resource ceilings).
• Components: :invalid_component, :unknown_component, :duplicate_component, :invalid_component_parameters, :incompatible_parameters.
• Context: :wrong_message_kind, :missing_request_context, :unavailable_origin, :unavailable_trailers, :missing_field.
• Fields: :non_ascii, :unknown_field_schema, :invalid_field_schema, :invalid_structured_field, :missing_dictionary_key.
• Query: :noncanonical_query_name, :invalid_query_encoding, :missing_query_parameter, :ambiguous_query_parameter.

Correct input or supply missing capture/schema evidence before retrying. None indicates cryptographic validity, authentication, or authorization. Errors contain only the enumerated reason; there is no exception or telemetry path.