Summary

Fixes ODP identify event to only send when multiple valid identifiers exist. Previously, the SDK always sent an identify event when creating a user context, even with just a single fs_user_id. This wastes network calls and pollutes ODP identity graphs with single-identifier records that provide no linking value.

Changes

• Changed identify_user method signature across the identify chain to accept an identifiers hash instead of a single user_id keyword argument
• Added identifier count check in OdpManager#identify_user to skip sending when fewer than 2 valid identifiers are present
• Filters out identifiers with nil or empty string values before counting
• Added debug-level logging when the identify event is skipped due to single identifier
• Updated OptimizelyUserContext to construct identifiers hash using the KEY_FOR_USER_ID constant
• Updated existing tests and added new tests for single-identifier blocking and empty-value filtering

Jira Ticket

FSSDK-12670

Notes

• Reference implementation: Python SDK PR #513