Simplify AI memory pipeline

api/app/core/log_events.py

@@ -58,6 +58,7 @@ def correlation_bind_kwargs(
 
 # bind=True 任务的 positional 与字段名映射（kwargs 优先，缺位再填）
 _TASK_POSITIONAL_FIELDS: dict[str, tuple[str, ...]] = {
+    "app.tasks.memory_enrichment_tasks.embed_memory_source": ("user_id", "source_id"),
     "app.tasks.memory_enrichment_tasks.enrich_memory_source": ("user_id", "source_id"),
     "app.tasks.memory_compaction_tasks.memory_compaction_run": ("user_id",),
     "app.tasks.chapter_compose_tasks.recompose_chapter": ("chapter_id",),