chore(comparative workflows): Filter non groupby attrs

[jasonyuezhang]

• Use Attribute Names RPC to fetch public attributes
• filter to only the attributes available in the groupby

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Copied from getsentry#101902
Original PR: getsentry#101902

[propel-test-bot]

Filter Non-Groupby Attributes in Comparative Workflows Endpoint

This pull request updates the OrganizationTraceItemsAttributesRankedEndpoint to fetch and filter span attribute names using the attribute_names_rpc call. Only attributes available in the groupby (those returned by the Attribute Names RPC and deemed public/exposable) are included in the comparative attribute ranking results. The update also modifies test coverage to patch this new RPC, ensuring that only public attributes are passed to the response and internal/private/meta attributes are filtered out by the endpoint's logic.

Key Changes

• Added import and invocation of attribute_names_rpc with TraceItemAttributeNamesRequest to fetch possible public string attributes.
• Intersection filtering: only allow attributes present in the fetched attribute name allowlist and pass exposure checks using can_expose_attribute.
• Refactored filtering logic in the attribute processing loops for both cohorts.
• Extended test test_filters_out_internal_and_private_attributes: mocks attribute names RPC and verifies correct filtering of public/internal/meta/private attributes.

Affected Areas

• src/sentry/api/endpoints/organization_trace_item_attributes_ranked.py (core endpoint logic)
• tests/snuba/api/endpoints/test_organization_trace_item_attributes_ranked.py (targeted test coverage and mocking)

This summary was automatically generated by @propel-code-bot