Module error 

Error types for the gnss-time crate.

This module defines the unified error type used across all fallible operations in the crate, including conversions, arithmetic, and time-scale transformations.

The design follows a strict principle:

• No hidden failure modes — all fallible operations return Result
• Explicit error context — each variant describes a recoverable class of failure
• #[non_exhaustive] for forward compatibility

Enums

GnssTimeError

Errors returned by fallible gnss-time operations.