add tests to canceled enrollment or scheduled with seat

enrollments-events/app/enrollment.py

@@ -38,7 +38,7 @@ class Course(BaseModel):
 
 
 class Enrollment(BaseModel):
-    id: UUID4 | str = Field(default_factory=uuid4)
+    id: UUID4 | str
     user: User
     course: Course
     progress: int = Field(default=0, ge=0, le=100)
@@ -61,7 +61,7 @@ Org = TypedDict('Org', {'org_id': str, 'name': str})
 
 CreatedBy = TypedDict('CreatedBy', {'id': str, 'name': str})
 
-Seat = TypedDict('Seat', {'order_id': str})
+Seat = TypedDict('Seat', {'order_id': str, 'enrollment_id': NotRequired[str]})
 
 DeduplicationWindow = TypedDict('DeduplicationWindow', {'offset_days': int})