feat(qav3): partial trade exiting (#2)

feat(qav3): partial trade exiting (#2)

* feat: partial trade exiting

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
* chore(qav3): bump strategy version

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
* fix(qav3): fix final trade exiting conditions

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
)#

* fix(qav3): ensure the trade securisation tunable can't be wrongly
triggered

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
* chore: fine tune default trade secure percent

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
* refactor(qav3): ensure custom_exit() return

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
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Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>