fix: add blobscan DIRECT_URL env var (#936)

Fixes #916

Author: PabloCastellano

.github/tests/mix-with-tools.yaml

@@ -20,6 +20,7 @@ additional_services:
   - prometheus_grafana
   - spamoor_blob
   - custom_flood
+  - blobscan
   - dugtrio
   - blutgang
   - apache

src/blobscan/blobscan_launcher.star

@@ -171,6 +171,7 @@ def get_api_config(
         env_vars={
             "CHAIN_ID": network_id,
             "DATABASE_URL": postgres_url,
+            "DIRECT_URL": postgres_url,
             "REDIS_URI": redis_url,
             "SECRET_KEY": SECRET_KEY,
             "BLOBSCAN_API_PORT": str(API_HTTP_PORT_NUMBER),
@@ -229,6 +230,7 @@ def get_web_config(
         public_ports=public_ports,
         env_vars={
             "DATABASE_URL": postgres_url,
+            "DIRECT_URL": postgres_url,
             "NEXT_PUBLIC_NETWORK_NAME": network_name
             if network_name in constants.PUBLIC_NETWORKS
             else "devnet",