Added tag 0.15.0 for changeset e9ecc528967a

pkg: prepare 0.15

api: better indication of what operation is ambiguous

scheduler: avoid overlapping scheduling of the same tasks

For this we fundamentally use the `max_instances = 1` behaviour of
the base apscheduler.

We need to give add_job a function that runs until the end. This will
enable appscheduler to not schedule a new task if the previous is not
finnished.

test: show that scheduled tasks can overlap

helper/prepared: a small function to get the pre-scheduled tasks and their payload

Added tag 0.14.0 for changeset d7587473fd2b

pkg: prepare 0.14

test/api: also with moments

helper/convert_io: provide a converted from strings to the types needed for prepare or schedule calls

api/prepare: do type validation of the input data

This will avoid further pain when we get back the data
to the web ui for instance (rework_ui).

test/api: show that prepare crashes in an undisciplined way on bad input

(and we know it sometimes it also does not crash on bad input ...)

helper/neary_unpack: fix a bad exception type

test/cli/scheduler: make the test more robust against time effects

It is perfectly possible that another task was scheduled just after the
first one did finish. This used to show up on slower machines.

switch from zstd to pyzstd

It offers almost the same interface and binary packages are provided.

ci: have a sourcehut build spec

cli/list-tasks: show more information for the abort case

api/prepare: detect when we prepare a task on a non existing operation / domain

tests: replace format calls with f-strings