[DFC Product] Ensure Product details are synced at correct intervals

[RaggedStaff]

We need to ensure Product details are automatically updated when appropriate, and not when not appropriate.

There is an agreement within FDC that only Stock details will be updated within an Order Cycle (Sales Session).

All other details (image, description, title, etc) should be refreshed between OC's (potentially when setting up an OC and at the start of every OC)

[RaggedStaff]

@mkllnk Does the above make sense? Is it duplicated elsewhere ?