feat: initial project setup

.env.example

@@ -0,0 +1,12 @@
+# ── PostgreSQL ───────────────────────────────────────────────────────────────
+POSTGRES_HOST=postgres
+POSTGRES_PORT=5432
+POSTGRES_USER=dagster
+POSTGRES_PASSWORD=changeme
+POSTGRES_DB=dagster
+
+# ── Dagster metadata storage (uses the same postgres instance) ───────────────
+DAGSTER_POSTGRES_URL=postgresql://dagster:changeme@postgres:5432/dagster
+
+# ── dbt profile target (overrides profiles.yml env_var defaults) ─────────────
+DBT_TARGET=dev