20260817 fe147 installer原生支持custom TAL模式：RIRS=custom+TAL_INPUT_MODE=custom-file-with-ta+CUSTOM_*全套env，compose挂载fixtures目录，start.sh支持CUSTOM_REPO_NETWORK无竞态接入

deploy/docker-installer/scripts/start.sh

@@ -47,7 +47,21 @@ if has_success_run; then
 fi
 
 log "starting core soak service"
-compose_cmd --profile core up -d ours-rp-soak
+if [[ -n "${CUSTOM_REPO_NETWORK:-}" ]]; then
+  # Custom TAL mode against the stack local test repository: create the soak
+  # container without starting it, attach the shared external network first,
+  # then start it. This avoids the first snapshot racing the network connect.
+  compose_cmd --profile core up -d --no-start ours-rp-soak 2>/dev/null \
+    || compose_cmd --profile core create ours-rp-soak
+  soak_container="${COMPOSE_PROJECT_NAME:-ours-rp-package-installer}-soak"
+  if ! docker inspect -f '{{json .NetworkSettings.Networks}}' "$soak_container" | grep -q "\"$CUSTOM_REPO_NETWORK\""; then
+    log "attaching soak container to custom repo network: $CUSTOM_REPO_NETWORK"
+    docker network connect "$CUSTOM_REPO_NETWORK" "$soak_container"
+  fi
+  compose_cmd --profile core start ours-rp-soak
+else
+  compose_cmd --profile core up -d ours-rp-soak
+fi
 
 if [[ "$had_success" == "0" && "$WAIT_FIRST_RUN" == "1" ]]; then
   log "no previous successful run found; waiting for first run timeout=${timeout_secs}s"