psql: use `created` colum to sort by creation: `item_id` was used to sort by creation because it correspond to it and it's slighly more efficient, but #398 raises the use case of manually modified database to import items. The column has been changed to suit this use case, and `item_id` is now always added as last order, in case of date conflicts. This patch extends a contribution from Stephen Paul Weber (Singpolyma) from the ticket mentioned below. fix: 398

attrs==20.3.0
Automat==20.2.0
cffi==1.14.5
constantly==15.1.0
cryptography==3.4.6
hyperlink==21.0.0
idna==3.1
incremental==21.3.0
psycopg2==2.8.6
pyasn1==0.4.8
pyasn1-modules==0.2.8
pycparser==2.20
pyOpenSSL==20.0.1
python-dateutil==2.8.1
service-identity==18.1.0
six==1.15.0
Twisted==21.2.0
uuid==1.30
wokkel==18.0.0
zope.interface==5.2.0

sat-tmp @ hg+https://repos.goffi.org/sat_tmp
-e .