feat: add postgres support in addition to sqlite for recon

[dav1do]

All Store tests run with postgres and sqlite. Postgres tests no-op unless PG_TESTS=1, so that cargo test still passes even if you haven't set up a docker postgres image. In CI we can run them all in order to make sure the postgres type/query handling is valid. The make check-migrations-ci command handles setting up the dbs, applying migrations, running tests (will duplicate some tests with the current make tests command but tries to use the same parameters to avoid rebuildling things), and then cleaning up.

The database can be specified with ceramic-one daemon --database-url $DB_URL or CERAMIC_ONE_DATABASE_URL="..." ceramic-one daemon. Postgres or sqlite will be chosen based on the URL prefix, and defaults to putting a sqlite file in the "default directory" (see DaemonOpts::default_directory).

I also added put() to the iron_bitswap::Store trait as we were going through the concrete struct before. I couldn't get away from using concrete types, so I select the database and then use generics to bind them to the flavors of trait we need. We should be able to simplify/consolidate some of these traits now that we rely on &self rather than &mut self in recon::Store, but this PR is already big.