`codeintel.syntax_highlight.repo` key in Honeycomb is sometimes missing

[varungandhi-src]

https://ui.honeycomb.io/sourcegraph/datasets/codeintel-syntax-highlighting/result/hk87sypGksG

This is from the results for the past 7 days.

[varungandhi-src]

There is a code path here: https://sourcegraph.com/github.com/sourcegraph/sourcegraph@93351849f36b658fec257eacbd6ef36eed070fcd/-/blob/client/branded/src/search-ui/components/CommitSearchResultMatch.tsx?L38-43

We're not passing in the repo + revision information here. However, the parameter item has attached repository and oid fields. https://sourcegraph.com/github.com/sourcegraph/sourcegraph/-/blob/client/shared/src/search/stream.ts?L132-136

We should just pass those in to the backend so that they can be included in the Honeycomb data.

The trace is initialized here: https://sourcegraph.com/github.com/sourcegraph/sourcegraph@93351849f36b658fec257eacbd6ef36eed070fcd/-/blob/internal/highlight/highlight.go?L335-337