Immutable, sanitized network attempt event delivered to a DiagnosticSink.
An HTTP attempt ended without a successful response.
An HTTP attempt is about to start.
An HTTP attempt returned a successful response.
One-based attempt number under correlationId.
Local-only logical request identifier.
Monotonic elapsed time for this attempt; zero on request start.
Uppercase HTTP method.
Sanitized request-shape metadata.
Fixed gateway label or sanitized signed-upload origin.
Network boundary used by this attempt.