fix calculation logic, fix api endpoint

scripts/measure_debug.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# 从仓库根目录运行单条鱼测量（与 fish_api / measure-watch 同一子进程逻辑）。
+# 用法：bash scripts/measure_debug.sh --fish-id 14
+# 若在 fish_api 目录下，可直接：python -m app.measure_debug_cli --fish-id 14
+set -euo pipefail
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT/fish_api"
+if command -v uv >/dev/null 2>&1; then
+  exec uv run python -m app.measure_debug_cli "$@"
+fi
+exec "${PYTHON:-python3}" -m app.measure_debug_cli "$@"