Refactor documents upload. Add bid proposal document. Refactor clients. Make single client for cdb. Improve client time sync. #282

Job	Run time
flake8	6s
pytest-fast (reporting)	24s
black	7s
pytest-fast (negotiation)	1m 48s
pytest-fast (negotiation_quick)	1m 9s
pytest-fast (below_threshold)	22s
pytest-fast (below_threshold_multilot)	15s
pytest-fast (above_threshold_eu)	31s
pytest-fast (above_threshold_eu_multilot)	16s
pytest-fast (above_threshold_eu_plan)	18s
pytest-fast (above_threshold_eu_tender)	12s
pytest-fast (above_threshold_ua)	35s
pytest-fast (above_threshold_ua_multilot)	29s
pytest-fast (above_threshold_ua_features)	35s
pytest-fast (above_threshold_ua_multilot_features)	19s
pytest-fast (above_threshold_ua_lcc)	24s
pytest-fast (above_threshold_ua_multilot_lcc)	22s
pytest-fast (close_framework_agreement_ua)	27s
pytest-fast (close_framework_agreement_ua_central)	28s
pytest-fast (competitive_dialogue_eu)	41s
pytest-fast (competitive_dialogue_ua)	37s
pytest-fast (esco)	38s
pytest-fast (esco_features)	34s
pytest-fast (esco_multilot)	13s
pytest-fast (simple_defense)	18s
	12m 8s

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