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Summary of changes
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- Add `OverlordDataSourcesResource` with APIs to mark segments used/unused
- Add corresponding methods to `OverlordClient`
- Deprecate Coordinator APIs to update segments
- Use `OverlordClient` in `DataSourcesResource` so that Coordinator APIs internally
call the corresponding Overlord APIs
- If the API call fails, fall back to updating the metadata store directly
- Audit these actions only on the Overlord
Other minor changes
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- Do not perform null check on `OverlordClient` on the coordinator side `DataSourcesResource`.
`OverlordClient` is always non-null in production.
- Add new tests, fix existing ones
- Complete the implementation of `TestSegmentsMetadataManager`
New Overlord APIs
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- Mark all segments of a datasource as unused:
`POST /druid/indexer/v1/datasources/{dataSourceName}`
- Mark all (non-overshadowed) segments of a datasource as used:
`DELETE /druid/indexer/v1/datasources/{dataSourceName}`
- Mark multiple segments as used
`POST /druid/indexer/v1/datasources/{dataSourceName}/markUsed`
- Mark multiple (non-overshadowed) segments as unused
`POST /druid/indexer/v1/datasources/{dataSourceName}/markUnused`
- Mark a single segment as used:
`POST /druid/indexer/v1/datasources/{dataSourceName}/segments/{segmentId}`
- Mark a single segment as unused:
`DELETE /druid/indexer/v1/datasources/{dataSourceName}/segments/{segmentId}`