Claude-assisted improvements (untested)

- dev auth flow (side-step OAuth)
- db event processing integration tests
- dev scripts (eg Makefile)
- db / test db migration setup scripts.

Makefile

@@ -0,0 +1,55 @@
+.DEFAULT_GOAL := dev
+
+-include .env
+export
+
+MIGRATE := migrate -path database_migrations -database "$(DATABASE_URL)"
+MIGRATE_TEST := migrate -path database_migrations -database "$(TEST_DATABASE_URL)"
+
+.PHONY: dev migrate-up migrate-down migrate-version tailwind run \
+	test test-against-dev-db migrate-test-up migrate-test-down migrate-test-version
+
+# applies pending migrations, starts the tailwind watcher in the background,
+# then runs the server in the foreground. Ctrl-C stops both.
+dev: migrate-up
+	@./tailwind.sh & \
+	TW_PID=$$!; \
+	trap "kill $$TW_PID 2>/dev/null" EXIT INT TERM; \
+	go run .
+
+migrate-up:
+	$(MIGRATE) up
+
+migrate-down:
+	$(MIGRATE) down 1
+
+migrate-version:
+	$(MIGRATE) version
+
+tailwind:
+	./tailwind.sh
+
+run:
+	go run .
+
+# runs the integration test suite against TEST_DATABASE_URL (the dedicated
+# inventory_2_test database by default). Applies pending migrations there
+# first.
+test: migrate-test-up
+	go test ./...
+
+# same as `test`, but points TEST_DATABASE_URL at the real dev database for
+# this run instead of the dedicated test database - useful for checking
+# behavior against real data. Leaves the dev DB in whatever state the tests'
+# own cleanup produces; it's still your dev data, treat it accordingly.
+test-against-dev-db: TEST_DATABASE_URL := $(DATABASE_URL)
+test-against-dev-db: test
+
+migrate-test-up:
+	$(MIGRATE_TEST) up
+
+migrate-test-down:
+	$(MIGRATE_TEST) down 1
+
+migrate-test-version:
+	$(MIGRATE_TEST) version