- Add `aliases` and `end_user_id` fields to user entity dicts in
`collect_user_entities_for_metadata` so downstream tasks can write
them to PostgreSQL
- Add `update_aliases_and_metadata` method to `EndUserInfoRepository`
for incremental, case-insensitive dedup merge of aliases and
structured metadata fields
- Add `_sync_end_user_info_pg` helper in tasks.py that writes aliases
and extracted metadata to `end_user_info`, and back-fills
`end_user.other_name` when empty
- Call `_sync_end_user_info_pg` from `extract_metadata_batch_task`
after Neo4j write, and also when no new metadata but aliases exist
- Filter `meta_data` response in `UserMemoryService.get_end_user_info`
to expose only four core fields: goals, traits, interests, core_facts
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