Show bulk import errors

[tumbledwyer]

Describe the improvement

Return the result of the re-index to the caller

Pitch

Bulk import may fail to index records but that failure is not returned to the caller, making index issues hard to solve

Acceptance Criteria

GIVEN I send a request for import import
WHEN it fails to index
THEN I should get the index error in the response

[makelicious]

PR seems to be merged already