- Fix the user filter to work with `edge_logs`.
- Update the `auth_user` field to be derived from other log attributes.
- Removed filtering for `postgres_logs` since it didn't really filter by
user actions, only by user id mentions.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **Bug Fixes**
- Improved unified logs user filtering to rely only on exact attribution
identifiers from authentication and edge log sources, removing partial
message-based matching.
- Updated unified logs user identification by deriving `auth_user` from
authentication actor IDs or edge JWT subject values.
- Refined “user filter reachability” logic to consider only attributable
log types (auth and edge).
- **Tests**
- Adjusted unified logs query tests to match the updated attribution
routing and reachability outcomes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Ivan Vasilov
8108528682