Check cache structure on CI

We need a CI script that runs:

• arkindex_worker.cache.create_tables
• arkindex_worker.cache.create_version_table
• dump the whole sqlite structure & content
• compare it to a known good version
• when there is a diff, crash, mentionning to bump the SQL version & generated file

This should prevent changes that do not update the version

Edit:

• This is too complicated and too much work
• See #168 (comment 219109)