MOD: utxo add sender

MOD: tx with aggregated signature;

MOD: verify transfer receivers before compare memos

MOD: transfer marked handled & passed if mixin.InvalidReceivers

MOD: build script; .gitignore

ADD: docker file; update Makefile, build script

MOD: auto migrate; go.mod

MOD:

MOD: worker errgroup with context

MOD: worker cmd add notify param;