fix: aggFn use default instead of null

[dhable]

Switched to the -OrDefault version of the float conversion when combined with the aggregate functions to prevent emitting null.

Ref: HDX-1379

[changeset-bot]

🦋 Changeset detected

Latest commit: cb240c2

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@hyperdx/common-utils	Minor
@hyperdx/api	Minor
@hyperdx/app	Minor

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Name	Status	Preview	Comments	Updated (UTC)
hyperdx-v2-oss-app	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 29, 2025 6:03pm

[Copilot]

Pull Request Overview

This PR fixes an issue with numeric aggregate functions by switching from a null conversion approach to one that uses the type’s default value. Key changes include updating the unsafe SQL expression in the chart config rendering, adding the executeSqlCommand helper in the API package, and introducing new tests for the aggFn functionality.

Reviewed Changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated no comments.

File	Description
packages/common-utils/src/renderChartConfig.ts	Updated the SQL expression conversion from toFloat64OrNull to toFloat64OrDefault
packages/api/src/fixtures.ts	Added a helper function executeSqlCommand for executing SQL commands against ClickHouse
packages/api/src/clickhouse/tests/renderChartConfig.test.ts	Introduced tests for numeric aggregate functions that now use default values
.changeset/curly-ducks-jump.md	Documented the changes for numeric aggregates in the changeset

Files not reviewed (2)

• packages/api/src/clickhouse/tests/snapshots/renderChartConfig.test.ts.snap: Language not supported
• packages/common-utils/src/tests/snapshots/renderChartConfig.test.ts.snap: Language not supported