Ensure updates that don't update last_modified_t are loaded

Switch to using last_updated_t from Product Opener to detect that something has changed.

Support product deletions

Merge pull request #89 from openfoodfacts/select-obsolete

fix: Don't limit select to obsolete / not obsolete

Efforts to reduce database size and improve performance

Includes replacing keys with int / bigint and only storing product JSON data temporarily

Increase PostgreSQL memory allocation

Increasing shared_buffers and work_mem to improve performance

Fix PostgreSQL transaction errors

Merge pull request #45 from openfoodfacts/issues/43a

Transposed staging and production

Redis support

Merge pull request #38 from openfoodfacts:redis-url

Pass redis url to container

Fix data quality tags and support new tags

Merge pull request #32 from openfoodfacts/chore-mongodb-stunnel-client

chore: change prod mongodb address (again)

Support unknown queries

Merge pull request #25 from openfoodfacts/issues/24

Cope with $in / $nin unknown queries

Fix support for $in and count issue

Merge pull request #23 from openfoodfacts:test-failure

Use a different tag to test loaded tags is updated

Support obsolete queries and extra tags

Merge pull request #18 from openfoodfacts/issues/17

bug: Wrap delete and insert of tags in a transaction