fix(optimizer): ускорить точный выбор проб из большого пула

lib/route-optimizer-assignment.test.ts

@@ -35,8 +35,8 @@ test("branch bound preserves legacy assignments for ties, incompatibility and pa
  const now=Date.parse("2026-10-04T12:00:00Z");context.mock.method(Date,"now",()=>now)
  let seed=917;const random=(n:number)=>{seed=(Math.imul(seed,1664525)+1013904223)>>>0;return (seed>>>8)%n}
  const names=["","ether1","ether2"," ETHER1 "]
- for(let fixture=0;fixture<1200;fixture++){
-   const count=1+random(4),wans=Array.from({length:count},()=>names[1+random(names.length-1)])
+ for(let fixture=0;fixture<1230;fixture++){
+   const count=fixture<1200?1+random(4):7,wans=Array.from({length:count},()=>names[1+random(names.length-1)])
    const pool=Array.from({length:count+random(3)},(_,i)=>({...probe(i,names[random(names.length)]),lastPingRttMs:random(2)?0:null,lastTxAvgMbps:random(2)?100:null,lastRxAvgMbps:random(2)?100:null,lastPingAt:random(3)?null:"2026-10-04T10:00:00Z"}))
    assert.deepEqual(chosen(wans,pool),legacy(wans,pool,now),`fixture ${fixture}`)
  }
@@ -51,3 +51,15 @@ test("early forced choice remains unchanged when a later WAN loses its compatibl
  const wans=["ether1", "ether1"],pool=[probe(0,"ether1"),probe(1,"ether2")]
  assert.deepEqual(chosen(wans,pool),["p0",null])
 })
+
+
+test("DFS uses one ranking time when the clock crosses an hour boundary",context=>{
+ const at=Date.parse('2026-10-07T12:00:00Z');let calls=0;context.mock.method(Date,'now',()=>at+calls++*3600000)
+ const pool=Array.from({length:3},(_,i)=>({...probe(i,''),lastPingAt:new Date(at-(2-i)*3600000).toISOString()}))
+ assert.deepEqual(chosen(['ether1','ether2'],pool),legacy(['ether1','ether2'],pool,at))
+})
+
+test("greedy fallback remains unchanged for eight WANs and a short pool",()=>{
+ const wans=Array.from({length:8},()=> 'ether1'),pool=[probe(0,'ether2'),probe(1,'ether1'),probe(2,''),probe(3,'')]
+ assert.deepEqual(chosen(wans,pool),['p1','p2','p3',null,null,null,null,null])
+})