v0.20.1

Changed

• Enriched converter metadata across multipart, redis, reqwest,
  serde_json and sqlx integrations to surface HTTP status details,
  retry-after hints and structured failure positions while keeping existing
  error categories intact.
• Updated the Teloxide mapping to classify ApiError::InvalidToken as
  Unauthorized and hash potentially sensitive network error details before
  emitting telemetry.

Tests

• Extended integration tests to assert the new metadata fields, retry hints,
  and redaction policies covering the updated converters.