Annotate channels with some ordered metadata #940

Job	Run time
Path match check	7s
Morango Integration Tests (3.6)	28m 19s
Morango Integration Tests with PostgreSQL	27m 14s
Morango Integration Tests (3.7)	27m 9s
Morango Integration Tests (3.8)	26m 16s
Morango Integration Tests (3.9)	26m 22s
Morango Integration Tests (3.10)	26m 2s
Morango Integration Tests (3.11)	25m 24s
Morango Integration Tests (3.12)	26m 34s
	3h 33m 27s

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