Migrate billing backend from Django to Express + Apollo Server + Prisma

Replace Python/Django/Graphene with TypeScript/Express/Apollo Server.
Same 2 endpoints (team/m2m), same JWT auth, same TigerBeetle integration.
Prisma ORM replaces Django ORM for Account/OperationCode/ServiceAccount.

docker-compose.yml

@@ -9,13 +9,11 @@ services:
       - PORT=8000
       - TB_CLUSTER_ID=0
       - TB_ADDRESS=tigerbeetle:3000
-      - INFISICAL_API_URL=${INFISICAL_API_URL}
-      - INFISICAL_ENV=${INFISICAL_ENV}
-      - INFISICAL_PROJECT_ID=${INFISICAL_PROJECT_ID}
-      - INFISICAL_CLIENT_ID=${INFISICAL_CLIENT_ID}
-      - INFISICAL_CLIENT_SECRET=${INFISICAL_CLIENT_SECRET}
-    security_opt:
-      - seccomp=unconfined
+      - BILLING_DATABASE_URL=postgresql://postgres:${BILLING_DB_PASSWORD}@${BILLING_DB_HOST}:5432/postgres
+      - LOGTO_JWKS_URL=${LOGTO_JWKS_URL}
+      - LOGTO_ISSUER=${LOGTO_ISSUER}
+      - LOGTO_BILLING_AUDIENCE=${LOGTO_BILLING_AUDIENCE}
+      - SENTRY_DSN=${SENTRY_DSN}
     depends_on:
       - tigerbeetle
     networks: