Module error 

Error taxonomy for Aurum.

Errors are grouped so callers (and the CLI) can present actionable messages:

• TranscriptionError::User — bad input, missing key, invalid model name
• TranscriptionError::Environment — missing ffmpeg, disk full, cache issues
• TranscriptionError::Provider — network, rate limit, model load failure
• TranscriptionError::Internal — unexpected bugs

Enums

EnvironmentError

ProviderError

TranscriptionError

Top-level error type used across the core library and CLI.

UserError

Type Aliases

Result

Result alias used throughout the crate.