Adopt the released dispatcher libraries so expected context cancellation during shutdown is handled by both the common dispatcher and transport adapters. Selected versions: edispatcher v3.1.4, edispatcher-kafka v3.0.3 and edispatcher-pg v3.0.4. Changes are limited to go.mod/go.sum. Validation: go test -timeout 120s ./..., go vet ./..., git diff --check and go list -m all passed; selected module versions match the requested tags. Branch IN-757 is based on the current master. Deployment and live rollout verification have not been performed.