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Database observability signals

Canonical database.query / database.mutation duration signals (ms).

field.key.label
Database observability signals
field.version.label
field.type.label
field.title.label
Database observability signals
field.description.label

Canonical database.query / database.mutation duration signals (ms).

field.tags.label
observability,signals,database,latency
field.owners.label
field.stability.label
public

Canonical observability signals for governed database access.

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`database.query` — governed read duration metric (`ms`).

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`database.mutation` — governed write duration metric (`ms`).

Both ids are stable, locale-free machine strings and reference canonical dimension ids only (`tenant.ref`, `database.table`, `database.operation`, `database.dialect`). Construct/validate via `defineSignal`.