工艺路线内置模版 Implementation Plan

For agentic workers: REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development or superpowers:executing-plans.

Goal: 复制 4 条工艺路线为内置模版（is_builtin=1），非 super_admin 不可改删；提供可在测试/生产执行的幂等 SQL。

Architecture: 表字段 is_builtin + CRUD/API 写守卫 + 前端按 isBuiltin/isSuperAdmin 禁用操作；SQL 深拷贝路线及步骤子表。

Tech Stack: MySQL 5.7, FastAPI, Vue 3, Element Plus

Spec: docs/superpowers/specs/2026-09-01-process-route-builtin-template-design.md

File map

File	Responsibility
`docs/sql/2026-09-01-process-route-add-is-builtin.sql`	ALTER 加字段
`docs/sql/2026-09-01-process-route-builtin-templates.sql`	幂等深拷贝 4 条
`backend/app/models/models.py`	`is_builtin` 列
`backend/app/crud/process_route.py`	序列化 + `assert_route_writable`
`backend/app/api/production.py`	写接口调用守卫
`backend/tests/test_process_route_builtin.py`	守卫单测
`web-admin/.../ProcessRouteTab.vue`	UI 禁用

Commits: 仅用户要求时提交。