test(budgets): iron-honest wall-clock budgets — 3x the worst honest-iron measurement

Seven micro-budget tests were calibrated on one fast desktop and failed on
other honest iron with zero functional failures (bisect-proven pre-existing;
David-waived for 10.1/10.2 with this recalibration filed as the cure). Every
budget is now at least 3x the worst measurement observed across three
machines, each with a comment naming its calibration basis; the find-unified
micro-comparison of two sub-millisecond timings becomes a ratio assertion
(absolute equality of microsecond pairs can never be stable). The
inference-bound trim-history correctness test gets a timeout covering its
slowest observed run (174s) — its assertions are exact and untouched.

These remain order-of-magnitude guards; real perf enforcement lives in the
dedicated perf lanes with iron-specific budgets, per the gate-speed standard.

Known non-test artifact, documented not hidden: on slow-inference machines a
minutes-long awaited-embed loop can trip vitest's worker-RPC 60s tolerance
('Timeout calling onTaskUpdate') — all tests pass, vitest exits 1 on the
unhandled orchestration error. The CI lanes on faster iron exit clean; if a
lane ever trips it, the test moves to deterministic embeddings (its
assertions are size-bookkeeping, not embedding quality).

tests/unit/neural/signals/EmbeddingSignal.test.ts

@@ -218,7 +218,10 @@ describe('EmbeddingSignal', () => {
 
       const finalStats = signal.getStats()
       expect(finalStats.historySize).toBeLessThanOrEqual(1000) // MAX_HISTORY = 1000
-    })
+      // Inference-bound correctness test (hundreds of real embeds): measured
+      // 116-174s on honest CPU-only iron across three machines — the timeout
+      // covers the slowest observed with headroom; the assertions are exact.
+    }, 600000)
 
     it('should clear history', async () => {
       const vector = await brain.embed('Test')
@@ -577,8 +580,9 @@ describe('EmbeddingSignal', () => {
       const endTime = Date.now()
       const totalTime = endTime - startTime
 
-      // Should be reasonably fast (< 5 seconds for 100 entities)
-      expect(totalTime).toBeLessThan(5000)
+      // order-of-magnitude guard: worst honest-iron measurement 22.3s
+      // (CPU-only inference, 32-core box) for 100 entities, 3x headroom
+      expect(totalTime).toBeLessThan(70000)
 
       const stats = signal.getStats()
       expect(stats.calls).toBe(100)