Hi! There's a bug in ContainedPartIndex. It fails when you try to add an item with very long DisplayText (over 255 chars) to the component's list. It happens as ContainedPartIndex.DisplayText column has maximum length of 255 chars but provider does not truncate lengs of display text

Orchard Core 1.8.2

To Reproduce

1. Create an item with List part
2. Try to create item in the list with title longer than 255 chars

Expected behavior

Item is created

Actual behavior

Item is not created