v0.3.2

Added

• New feature flag turnkey:
  • Provides TurnkeyErrorKind (stable taxonomy of Turnkey-specific failures).
  • Provides TurnkeyError (kind + public message).
  • Adds classify_turnkey_error helper for mapping raw SDK/provider messages.
  • Includes conversions into AppError / AppErrorKind.

Notes

• Feature is framework-agnostic; no extra dependencies are pulled.