NATO explicitly added plans to offer membership to Ukraine and Georgia at the Bucharest summit,
That's the complete opposite of what happened. The key outcome of the Bucharest summit is that Ukraine and Georgia were explicitly denied Membership Action Plans, which would have been the crucial step needed to move their application forward. Instead they got kicked downstairs to "aspirational" status, which they both complained loudly and bitterly about. This was very, very big news at the time.
So no, Ukraine was not "absolutely moving toward membership" as of that date. They might be moving in a different direction now, but if so that's a result of the invasion, not the 2008 summit.
That's the complete opposite of what happened. The key outcome of the Bucharest summit is that Ukraine and Georgia were explicitly denied Membership Action Plans, which would have been the crucial step needed to move their application forward. Instead they got kicked downstairs to "aspirational" status, which they both complained loudly and bitterly about. This was very, very big news at the time.
So no, Ukraine was not "absolutely moving toward membership" as of that date. They might be moving in a different direction now, but if so that's a result of the invasion, not the 2008 summit.