fix(convex): load env via env_file instead of sourcing .env (spaces-safe)

stack.yml

@@ -45,11 +45,12 @@ services:
       bash -lc "corepack enable \
       && corepack prepare pnpm@9 --activate \
       && pnpm install --frozen-lockfile \
-      && set -a && . ./.env && set +a \
       && pnpm convex:dev --port 3210 --hostname 0.0.0.0"
     volumes:
       - /srv/apps/sistema:/app
       - convex_data:/root/.convex
+    env_file:
+      - /srv/apps/sistema/.env
     environment:
       NODE_ENV: "production"
     deploy: