feat(core): Allow BN to sync headers from network outside of pruning window #4653
Description
Implementation ideas
The current implementation of pruned BN syncs full blocks from the consensus starting from genesis. When prunIng is enabled it downloads the entire block but only stores the header outside of pruning window
To optimize this inefficiency, we should allow bridge nodes to sync headers from the network outside the pruning window. This mode is much more efficient due to reduced bandwidth usage and should become the default behavior.
However, we should still keep the option to sync BN exclusively from the consensus node.