mavend: the simulator routes on the seeds the deploy loads (V-465)

The seed path was relative to the working directory, which is cmd/mavend
under `go test`. Every open failed, and the three scenarios replayed a whole
scripted day against a classifier holding zero examples. They passed. A green
simulator was proving something other than the routing the box runs, and a
regression in the seed set could not have surfaced there.

seedPath walks up to five levels to find models/seeds, so the daemon started
from the repo root behaves exactly as before and a test started anywhere
inside the tree finds the same files. All three scenarios still pass with 339
seeds loaded, so the outcome was not resting on the empty classifier.

The new test asserts the count rather than logging it. A silent zero is the
failure that hid here.

cmd/mavend/simulator_test.go

@@ -1043,3 +1043,26 @@ func TestSimulatorRefusesBackwardsSteps(t *testing.T) {
 		t.Errorf("the clock moved to %s on a refused step, it must stay at 09:00", got)
 	}
 }
+
+// TestSimulatorRoutesWithTheDeployedSeeds — the scenarios must replay against
+// the classifier the deploy runs, not an empty one.
+//
+// They did not. The seed path was relative to the working directory, which is
+// cmd/mavend under `go test`, so every file failed to open and the whole
+// simulator scored three green scenarios with zero examples loaded (Vikunja
+// #465). The count is asserted rather than logged, because a silent zero is
+// exactly the failure that hid here for as long as it did.
+func TestSimulatorRoutesWithTheDeployedSeeds(t *testing.T) {
+	cls := router.NewClassifier(router.NewHashEmbedder(1024))
+	seedClassifier(cls)
+	total := 0
+	for _, intent := range cls.Intents() {
+		total += len(cls.Examples(intent))
+	}
+	if total == 0 {
+		t.Fatalf("no seed examples loaded from %s — the simulator would route on nothing", seedPath())
+	}
+	if len(cls.Intents()) != 7 {
+		t.Fatalf("seeded %d intents, want all 7", len(cls.Intents()))
+	}
+}