Coverage stops 1 timestamp too early

[HomoCodens]

Coverage is generated via the following bit: SET coverage = concat('[', ts_data->'time'->0, ',', ts_data->'time'->-1, ')')::daterange;

However this means the last timestamp of a series is always excluded (leading to empty ranges in the extreme case of length-one series).

It should be SET coverage = concat('[', ts_data->'time'->0, ',', ts_data->'time'->-1, ']')::daterange;