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This might need to be reverted when properly addressing files deletion
(while monitoring filesystem or when reloading)
However, as of now, I'm not confident this respect the object ownership
graph anyway

Rename name -> title

This will avoid random crash due to dangling pointer in case the DB was
released

This allow the Cache helper to set it automatically, and avoid cache
misses when relying on the primary key as the cache column (since the
primary key was always 0)