Adds support to exclude fields from _source#943
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Why are these changes being introduced: * We are starting to add very large fields into our OpenSearch _source, which we are concerned may cause performance issues Relevant ticket(s): * https://mitlibraries.atlassian.net/browse/USE-406 How does this address that need: * Introduces an ENV variable to specify fields to exclude from _source
jazairi
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Feb 11, 2026
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jazairi
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jazairi
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I haven't verified locally, but the code is clear and the test coverage gives me confidence that this works as expected. 
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Why are these changes being introduced:
Relevant ticket(s):
How does this address that need:
Developer
our guide and
all issues introduced by these changes have been resolved or opened as new
issues (link to those issues in the Pull Request details above)
Code Reviewer
(not just this pull request message)
Requires database migrations?
NO
Includes new or updated dependencies?
NO