Refactor documents upload. Add bid proposal document. Refactor clients. Make single client for cdb. Improve client time sync. #290

Job	Run time
flake8	14s
black	14s
pytest-fast (above_threshold)	32s
pytest-fast (above_threshold_features)	31s
pytest-fast (above_threshold_lcc)	33s
pytest-fast (above_threshold_eu)	38s
pytest-fast (above_threshold_eu_features)	30s
pytest-fast (above_threshold_eu_lcc)	31s
pytest-fast (above_threshold_ua)	37s
pytest-fast (above_threshold_ua_features)	39s
pytest-fast (above_threshold_ua_lcc)	36s
pytest-fast (below_threshold)	30s
pytest-fast (below_threshold_central)	32s
pytest-fast (below_threshold_features)	24s
pytest-fast (close_framework_agreement_ua)	31s
pytest-fast (close_framework_agreement_ua_central)	46s
pytest-fast (competitive_dialogue_eu)	35s
pytest-fast (competitive_dialogue_ua)	38s
pytest-fast (competitive_dialogue_ua_features)	34s
pytest-fast (esco)	28s
pytest-fast (esco_features)	32s
pytest-fast (negotiation)	2m 4s
pytest-fast (negotiation_quick)	1m 9s
pytest-fast (reporting)	20s
pytest-fast (simple_defense)	36s
	15m 14s

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