Revert "Reverts threading of reader."

This reverts commit 41e7418150465dbd2b66a968811eb17423b55b82.
Revert "Revert "[#65486620] Moves the processing of messages into a deferred EM process to keep the heartbeat from being blocked""

This reverts commit ce5aed7a0cd2c0bb2a0af7f6392acc24437536da.
Revert "Revert "Implements AR Deferrable runner type to handle active record connection and disconnection in multithreaded processes""

This reverts commit 7a771335978c91b058f00af93c352070311b25bf.
Revert "Revert "[#64112702] adds test for additional runners from config and corrects false positives in Superbolt::App spec""

This reverts commit 7ed111fdfea6c2573746caeaa8d031886a9c3544.
Revert "Revert "bumps the version number""

This reverts commit 714359b01a6bbf4349214b80614a4c4fe2a601dc.
[#64112702] Switches superbolt to use Bunny for subscribing