Merge V1.0.0 rc6xx into v1.x.x - #1041

If desired power is already reached without the need to use some
inverters, their powers need to be set to zero.

If not, their original powers would remain and the target powers would
be wrong.

In case the requested power is zero, this was also leading to crashes
because there were no allocations.  This change also fixes that issue.

Signed-off-by: Sahas Subramanian <sahas.subramanian@proton.me>

To exclude PV inverters that didn't send any data. The power distributor
crashes because it tried to get data from a component that didn't send
any data since the application startup.

Signed-off-by: cwasicki <126617870+cwasicki@users.noreply.github.com>

If there are no gaps in the ring buffer and the new value is missing
and creates a gap in time, we need to start the new gap after the
latest value from before.

Signed-off-by: cwasicki <126617870+cwasicki@users.noreply.github.com>

If there are no gaps in the ring buffer and the new value is missing and
creates a gap in time, we need to start the new gap after the latest
value from before.

Fixes #646.

`Task.exception()` returns raised exceptions as values, unless tasks
raised `CancelledError`, in which case, `Task.exception()` raises
`CancelledError` as well:
https://docs.python.org/3/library/asyncio-task.html#asyncio.Task.exception

`Task.result()` provides a more consistent interface, by always
re-raising all caught exceptions.

Signed-off-by: Sahas Subramanian <sahas.subramanian@proton.me>

Signed-off-by: Sahas Subramanian <sahas.subramanian@proton.me>

This is a backport of #1020 to 1.0.0-rc-6xx