Module observe 

Optional metrics instrumentation for Azoth.

When the observe feature is enabled, key operations emit counters, histograms, and gauges via the [metrics] crate. A downstream application must install a metrics recorder (e.g. metrics-exporter-prometheus) to collect the data.

When the feature is not enabled every function in this module is a zero-cost no-op.

Functions

record_backup

Record a backup operation.

record_cache_lookup

Record a preflight cache hit or miss.

record_commit

Record a transaction commit (counter + latency histogram).

record_lock_wait

Record a lock acquisition wait time.

record_preflight

Record a preflight validation (counter + duration).

record_projector_run

Record a projector run (counter + duration + events processed).

set_cache_size

Set the current preflight cache size gauge.