Loong a6b5e985c4 fix(memory): require semantic valid_at timestamp (#18462) ...

## Summary

- require a `valid_at` timestamp in the semantic-memory output schema
- tell the extraction model to use conversation time when a fact has no
date of its own
- add a regression test for the assembled semantic prompt

This addresses the deterministic prompt inconsistency reported in
#18415. The invalid-timestamp fallback is intentionally left unchanged
because selecting its replacement policy requires a separate design
decision.

2026-08-19 18:32:27 +08:00

..

utils

fix(memory): require semantic valid_at timestamp (#18462)

2026-08-19 18:32:27 +08:00