feat(plan): task_kind on Note model + to_dict

src/fabledassistant/models/note.py

@@ -60,6 +60,10 @@ class Note(Base, TimestampMixin):
     # Structured metadata for entity types (person/place/list)
     # Named 'entity_meta' to avoid collision with SQLAlchemy's reserved 'metadata' attribute
     entity_meta: Mapped[dict | None] = mapped_column("metadata", JSONB, nullable=True)
+    # Task sub-kind — 'work' (default) or 'plan'. Only meaningful when the note
+    # is a task (status is not None); ordinary notes keep the 'work' default and
+    # ignore it. Orthogonal to note_type (which is the note/entity axis).
+    task_kind: Mapped[str] = mapped_column(Text, default="work", server_default="work")
 
     __table_args__ = (
         Index("ix_notes_tags", "tags", postgresql_using="gin"),
@@ -106,6 +110,7 @@ class Note(Base, TimestampMixin):
             ),
             "is_task": self.is_task,
             "note_type": self.entity_type,
+            "task_kind": self.task_kind,
             "metadata": self.entity_meta or {},
             "created_at": self.created_at.isoformat(),
             "updated_at": self.updated_at.isoformat(),