* feat: enable Postgres connections
* feat: implement migration templates
* feat: convert sqlite-specific migrations to migration templates; adjust SQL syntax
* fix: add migration to fix postgres incompatibilities in the DB schema
* fix: correct SQL syntax for comparisons in the transactions service
* feat: database migration tool
* chore: update tests for testing with Postgres
* fix: update test
* fix: explicitly store mock timestamps in UTC
* chore: add txdb to go.mod and run tidy
* fix: serialize concurrent transactions when running tests with txdb
* chore: update README to mention postgres
* fix: use timestamptz in Postgres
* test: add Github action for testing the backend with Postgres
* chore: fix migration name and add comments
* docs: add db migration notes to README
* fix: address PR feedback
* fix: rename the cmd/migrate tool to cmd/db_migrate
* feat: add schema check in the DB migration tool
* test: use testdb instead of txdb for testing with Postgresql
* fix: fix tests after merge
* chore: comment out unused VACUUM in migrations
* fix: reset Postgres sequences after migrating data
* docs: update migrate command in readme
* fix: do not allow backup for migration when postgres is enabled
* chore: add debug logs for db backend type
* chore: use Logrus instead of slog for db_migrate
* fix: initialize logger in the keys tests
* test: add db_migrate test
* fix: use transaction object in db_migrate function
* fix: txlock in db migration test
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Co-authored-by: Roland Bewick <roland.bewick@gmail.com>
