[ref] durs-bc: refactor dubp:check & treat cautious_mode

lib/core/core/src/lib.rs

lib/modules/blockchain/blockchain/src/dubp.rs

lib/modules/blockchain/blockchain/src/dubp/apply/mod.rs

lib/modules/blockchain/blockchain/src/dubp/check.rs

lib/modules/blockchain/blockchain/src/dubp/check/global.rs

lib/modules/blockchain/blockchain/src/dubp/check/hashs.rs

lib/modules/blockchain/blockchain/src/dubp/check/local.rs

lib/modules/blockchain/blockchain/src/dubp/check/pow.rs

lib/modules/blockchain/blockchain/src/dunp/receiver.rs

lib/modules/blockchain/blockchain/src/fork/rollback.rs

...odules/blockchain/blockchain/src/fork/stackable_blocks.rs

lib/modules/blockchain/blockchain/src/lib.rs

lib/modules/blockchain/blockchain/src/sync/apply/mod.rs

lib/modules/blockchain/blockchain/tests/common.rs

lib/tools/common-tools/src/traits/bool_ext.rs