Feat: heartbeats now update opinions

packages/ca/events.go

packages/ca/heartbeat/heartbeat.go

packages/ca/heartbeat/proto/heartbeat.pb.go

packages/ca/heartbeat/proto/heartbeat.proto

packages/ca/heartbeat_chain.go

packages/ca/heartbeat_manager.go

packages/ca/heartbeat_manager_test.go

packages/ca/neighbor_manager.go

packages/ca/neighbor_manager_events.go

packages/ca/neighbor_manager_options.go

packages/ca/statement_chain.go

packages/ca/statement_chain_events.go