feat: Added automatic script copying functionality

infra/modules/dev/templates/runners-docker-compose.yml.tftpl

@@ -6,6 +6,11 @@
 # GITEA_RUNNER_REGISTRATION_TOKEN is intentionally left as a compose variable
 # (not baked in here) - services/dev/spinup.sh generates a fresh token and
 # writes it to Runners/.env immediately before starting these containers.
+#
+# /data lives on dev's volume (${data_dir}) so runner identity survives a
+# server rebuild - baked in directly rather than via .env, since Runners/.env
+# is already reserved for the registration token above and gets overwritten
+# on every deploy.
 services:
 %{ for i in range(runner_count) ~}
   runner-${i + 1}:
@@ -13,7 +18,7 @@ services:
     container_name: gitea_runner_${i + 1}
     volumes:
       - ./config.yaml:/config.yaml
-      - ./gitea_runner_${i + 1}:/data
+      - ${data_dir}/gitea_runner_${i + 1}:/data
       - /var/run/docker.sock:/var/run/docker.sock
     networks:
       - proxy