Add missing SeqNo and PrimaryTerm fields in SearchHit

[emtammaru]

Description

Adds the missing fields SeqNo and PrimaryTerm to the SearchHit struct. These fields are optionally returned in the response as documented here with the seq_no_primary_term param: https://opensearch.org/docs/latest/api-reference/search/

Issues Resolved

N/A

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 67.96%. Comparing base (06a6dc8) to head (a907e9d). Report is 40 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #574 +/- ## =========================================== + Coverage 57.29% 67.96% +10.67% =========================================== Files 315 376 +61 Lines 9823 8853 -970 =========================================== + Hits 5628 6017 +389 + Misses 2902 1555 -1347 + Partials 1293 1281 -12 ``` | [Flag](https://app.codecov.io/gh/opensearch-project/opensearch-go/pull/574/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | Coverage Δ | | |---|---|---| | [integration](https://app.codecov.io/gh/opensearch-project/opensearch-go/pull/574/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | `60.41% <ø> (+9.57%)` | :arrow_up: | | [unit](https://app.codecov.io/gh/opensearch-project/opensearch-go/pull/574/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | `15.28% <ø> (+2.43%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/opensearch-project/opensearch-go/pull/574?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | Coverage Δ | | |---|---|---| | [opensearchapi/api\_search.go](https://app.codecov.io/gh/opensearch-project/opensearch-go/pull/574?src=pr&el=tree&filepath=opensearchapi%2Fapi_search.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project#diff-b3BlbnNlYXJjaGFwaS9hcGlfc2VhcmNoLmdv) | `100.00% <ø> (ø)` | | ... and [272 files with indirect coverage changes](https://app.codecov.io/gh/opensearch-project/opensearch-go/pull/574/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project)

[dblock]

Thanks! This needs a rebase.

The proposal in #284 might be of interest. Also appreciate if you could take this opportunity to check https://github.com/opensearch-project/opensearch-api-specification for these fields and maybe add a test there.

[emtammaru]

Thanks! This needs a rebase.

The proposal in #284 might be of interest. Also appreciate if you could take this opportunity to check https://github.com/opensearch-project/opensearch-api-specification for these fields and maybe add a test there.

Thank you, I checked the spec and I see the fields under response for https://opensearch-project.github.io/opensearch-api-specification/#/default/search.0. Could you point me to where I could add a test for it in https://github.com/opensearch-project/opensearch-api-specification?

[dblock]

I think https://github.com/opensearch-project/opensearch-api-specification/blob/73d552477f8f006f5ff49f451494d150b8378b18/tests/_core/search.yaml would be a logical place. As long as these are mentioned somewhere.