[server] improve TZDatetime support by depending on logilab-database 1.15.0 including https://www.logilab.org/ticket/1485893, we can now keep the tzinfo attribute on datetime objects for TZDatetime attributes, so one knows that this is a tz-aware datetime. To easily make it work with backends that have no tz support, we keep converting tz-aware datetime objects into utc naive datetime objects before sending them to the database.

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# re-read ComputedRelation permissions from schema.py now that we're

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# able to serialize them

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for computedrtype in schema.iter_computed_relations():

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    sync_schema_props_perms(computedrtype.type)