Module obs 

Optional observability helpers for broker flows.

Feature Flags

• Enable tracing to emit structured spans named oauth2_broker.flow with the flow (grant) and stage (call site) fields.
• Enable metrics to increment the oauth2_broker_flow_total counter for every attempt/success/failure, labeled by flow + outcome.

Structs

FlowSpan

A span builder used by broker flows.

FlowSpanGuard

RAII guard returned by FlowSpan::entered.

Enums

FlowKind

OAuth flow kinds observed by the broker.

FlowOutcome

Outcome labels recorded for each attempt.

Functions

record_flow_outcome

Records a flow outcome via the global metrics recorder (when enabled).

Type Aliases

InstrumentedFlow

Passthrough future type when tracing is disabled.