add notification for pull system

[whoabuddy]

when we detect we are X blocks behind from chainhooks and the pull system kicks in, we should send a Discord message or some kind of alert to check on things

somewhere around here (from logs):

Oct 27 20:24:21  2025-10-27 20:24:21 | INFO     | chain_state_monitor  | Current API block height | task=chain_state_monitor api_block_height=3627998
Oct 27 20:24:21  2025-10-27 20:24:21 | INFO     | chain_state_monitor  | Current DB block height | task=chain_state_monitor db_block_height=3627997
Oct 27 20:24:21  2025-10-27 20:24:21 | INFO     | chain_state_monitor  | Chain state is blocks behind the current chain tip | task=chain_state_monitor blocks_behind=1 db_block_height=3627997 api_block_height=3627998

Then if blocks_behind>10 or whatever the target is when the pull system kicks in, queue a message