fix(#patch); bastion-protocol; addressing QA

[melotik]

Fixing issue #492

Test endpoint: https://okgraph.xyz/?q=dmelotik%2Fbastion-protocol

Changes:

• [ ] hear back from graphprotocol about contract call issue: https://github.com/graphprotocol/graph-node/issues/3802
• [x] Add reward tokens
• [x] fix reward tokens
• [x] verify liquidation issue on 6/17