Refactor documents upload. Add bid proposal document. Refactor clients. Make single client for cdb. Improve client time sync. #288

Job	Run time
flake8	6s
black	9s
pytest-fast (above_threshold)	24s
pytest-fast (above_threshold_features)	26s
pytest-fast (above_threshold_lcc)	23s
pytest-fast (above_threshold_eu)	25s
pytest-fast (above_threshold_eu_features)	43s
pytest-fast (above_threshold_eu_lcc)	27s
pytest-fast (above_threshold_ua)	35s
pytest-fast (above_threshold_ua_features)	22s
pytest-fast (above_threshold_ua_lcc)	23s
pytest-fast (below_threshold)	22s
pytest-fast (below_threshold_central)	23s
pytest-fast (below_threshold_features)	21s
pytest-fast (close_framework_agreement_ua)	38s
pytest-fast (close_framework_agreement_ua_central)	34s
pytest-fast (competitive_dialogue_eu)	30s
pytest-fast (competitive_dialogue_ua)	26s
pytest-fast (competitive_dialogue_ua_features)	30s
pytest-fast (esco)	37s
pytest-fast (esco_features)	32s
pytest-fast (negotiation)	1m 47s
pytest-fast (negotiation_quick)	1m 4s
pytest-fast (reporting)	22s
pytest-fast (simple_defense)	28s
	12m 57s

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