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Module field

Module field 

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Common structured field names used in tracing spans and events.

Using named constants prevents typos and enables grep-based schema auditing.

Constantsยง

COMMAND_TYPE
Command type label.
DURATION_US
Duration in microseconds (for effect timing).
ELAPSED_US
Elapsed time in microseconds.
PENDING_HANDLES
Number of pending handles at shutdown.
REASON
Drop reason (backpressure, post_shutdown, etc.).
REQUESTED_LANE
Requested runtime lane (before resolution).
RESOLVED_LANE
Resolved runtime lane (after fallback).
ROLLOUT_POLICY
Rollout policy label.
SUB_ID
Subscription or task identifier.
TIMEOUT_MS
Timeout in milliseconds.