fix(alerts): отклонять запись устаревшего снимка правил

tests/e2e/alerts-context.spec.ts

@@ -1,6 +1,6 @@
 import {test,expect,type Page} from "@playwright/test"
 import {emptyAlerts,alertsWithRule} from "./fixtures/alerts"
-const headers={"access-control-allow-origin":"*","access-control-allow-methods":"GET,OPTIONS","access-control-allow-headers":"Content-Type,Authorization"}
+const headers={"access-control-allow-origin":"*","access-control-allow-methods":"GET,PUT,POST,OPTIONS","access-control-allow-headers":"Content-Type,Authorization,If-Match"}
 async function source(page:Page,value:string){const input=page.getByRole("textbox",{name:"URL бекенда",exact:true});await input.fill(value);await input.press("Enter");await expect(input).toHaveValue(value);await expect(page.getByText("Доступен",{exact:true})).toBeVisible()}
 for(const failed of [false,true])test("Alerts source: ABA discards old primary and target outcomes/"+failed,async({page})=>{
  const startedPaths=new Set<string>();let old=true,started=0,completed=0,release!:()=>void;const gate=new Promise<void>(resolve=>release=resolve)
@@ -27,7 +27,7 @@ for(const kind of ["save","test"] as const)for(const failed of [false,true])test
 for(const failed of [false,true])test("Rules source: ABA ignores old save and retains scoped unknown checkpoint/"+failed,async({page})=>{
  await page.route("**/health",r=>r.fulfill({headers,json:{status:"ok"}}));await page.route("**/api/**",r=>{const path=new URL(r.request().url()).pathname;return r.fulfill({headers,json:path==="/api/auth/config"?{required:false}:path==="/api/alerts"?alertsWithRule:path==="/api/filters/gre-tunnels"?{tunnels:[],failures:[]}:[]})})
  let started=false,completed=false,calls=0,release!:()=>void;const gate=new Promise<void>(resolve=>release=resolve)
- await page.route("http://localhost:8000/api/alerts/rules",async r=>{calls++;started=true;const body=r.request().postDataJSON();await gate;try{await r.fulfill(failed?{headers,status:503,json:{error:"OLD RULES FAILED"}}:{headers,json:{ok:true,groups:body.groups,rules:body.rules.map((row:object)=>({...row,lastFiredAt:null}))}})}catch{}finally{completed=true}})
+ await page.route("http://localhost:8000/api/alerts/rules",async r=>{calls++;started=true;const body=r.request().postDataJSON();await gate;try{await r.fulfill(failed?{headers,status:503,json:{error:"OLD RULES FAILED"}}:{headers,json:{ok:true,revision:"2".repeat(64),groups:body.groups,rules:body.rules.map((row:object)=>({...row,lastFiredAt:null}))}})}catch{}finally{completed=true}})
  const toggle=()=>page.getByRole("switch",{name:"Включить правило Fixture rule",exact:true})
  try{await page.goto("/alerts");await expect(toggle()).toBeEnabled();await toggle().click();await expect.poll(()=>started).toBe(true);await page.goto("/settings");await source(page,"http://localhost:8101");await page.goto("/alerts");await expect(toggle()).toBeEnabled();await page.goto("/settings");await source(page,"http://localhost:8000");await page.goto("/alerts");await expect(page.getByText(/Результат сохранения правил неизвестен/)).toBeVisible();release();await expect.poll(()=>completed).toBe(true);await expect(toggle()).toBeChecked();await expect(toggle()).toBeDisabled();await expect(page.getByText("Правила и группы сохранены в БД",{exact:true})).toHaveCount(0);await expect(page.getByText("OLD RULES FAILED",{exact:true})).toHaveCount(0);expect(calls).toBe(1)}finally{release()}
 })