`stdout` subscriber

Writes enriched events to stdout. Ordering is preserved — stdout is always serial. Logs go to stderr so they can be separated (2>log.txt).

Add to the subscribers block in config.yaml:

subscribers:
  stdout:
    enabled: true
    pretty: false       # false = single-line JSON (machine-readable), true = indented
    buffer_size: 1000

Available fields and defaults

Field	Default	Description
`enabled`	`false`	Enable the subscriber
`pretty`	`false`	`false` = single-line JSON; `true` = indented JSON
`buffer_size`	`1000`	In-memory channel capacity (events dropped when full)

See Common tuning for buffer_size semantics.