fix(types): add schema property to TimeseriesIndex type

[jdhoffa]

• Add schema type definition with version and generatedAt fields
• Implement schema property in output object of build-timeseries-files.ts
• Add schema property to generated index.gen.ts output

Also adds "src/data/index.gen.ts" to tsconfig.node.json, since index.gen.ts is used in src/utils/timeseriesIndex.ts (which itself is in src/utils/*).

Relates to #514

[github-actions]

Expected version change and release notes:

1.5.0-dev.19 (v1.5.0-dev.18...fix-ts_errors_index_gen ) (2025-11-05T14:48 UTC)

Fixes

• types: add schema property to TimeseriesIndex (a19cbc1)

Other

• add index.gen.ts to ts node config (07a04e5)

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[Copilot]

Pull Request Overview

This PR adds schema metadata to the timeseries index to track the version and generation timestamp. The changes introduce a schema field containing version (set to 1) and generatedAt (ISO timestamp) to both the generated index file and the build script's type definition.

Key changes:

• Added schema property to TimeseriesIndex type definition in the build script
• Populated schema field in the generated index with version 1 and current timestamp
• Updated the generated index.gen.ts file to include the new schema metadata

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
scripts/build-timeseries-files.ts	Adds schema field to TimeseriesIndex type and populates it with version and generation timestamp during build
src/data/index.gen.ts	Auto-generated file updated to include the new schema metadata field

Comments suppressed due to low confidence (1)

src/data/index.gen.ts:21

• The new schema field in the TimeseriesIndex type is not validated or tested. Consider adding a test in src/utils/timeseriesIndex.test.ts to verify that the schema field is present and has the expected structure (version as number, generatedAt as valid ISO string).

  schema: { version: number; generatedAt: string };

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[jdhoffa]

Closing in favour of #529

[AlexAxthelm]

This works, but the schema object was pretty noisy in the original version (timestamp made a bunch of diffs). I worked up #529 in its place.