Release 0.56.6

[odlbot]

Anastasia Beglova

• remove temporary code setting resource_category to resource_type_group (use resource_type_group for search backend #2981) (83c7093b)

[sentry]

Bug: Removing the resource_category fallback field before a full re-index completes will cause searches filtering by resource_type_group to return incomplete results.
_{Severity: HIGH}

Suggested Fix

Ensure that a full re-index of the search data is completed and the new index is live before deploying this code change. This will guarantee all documents have the resource_type_group field, preventing incomplete search results. Alternatively, delay the removal of the resource_category fallback logic until the re-index is confirmed to be finished in production.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: learning_resources_search/constants.py#L99

Potential issue: The code removes a temporary workaround that duplicated
`resource_type_group` data into the `resource_category` field. If this change is
deployed before a full OpenSearch re-index is completed, existing documents will not
have the `resource_type_group` field. When a user filters by `resource_type_group`, the
term query will not match these older documents, leading to silently incomplete search
results. This is a deployment-dependent issue; the bug manifests if the deployment
precedes the completion of the data migration.

_{Did we get this right? 👍 / 👎 to inform future reviews.}