Database migrations

alembic.ini

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+# Dev-only config for the alembic CLI (the app runs migrations itself at
+# startup via pirats.database.run_migrations).
+#
+# New migration:  .venv/bin/alembic revision --autogenerate -m "add foo column"
+# Apply:          .venv/bin/alembic upgrade head
+#
+# No sqlalchemy.url here: env.py uses the app's engine (DATABASE_URL or
+# ./rats_with_gats.db). Override with: alembic -x url=sqlite:///other.db ...
+
+[alembic]
+script_location = src/pirats/migrations
+file_template = %%(rev)s_%%(slug)s
+prepend_sys_path = src
+
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARNING
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARNING
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S