fix(stats): count soft-deleted users in the experiment funnel

The base user query dropped soft-deleted accounts (SoftDeletes scope), so
their variant assignment, connection cost and burn vanished from the report
- biased asymmetrically (prod: 8/9/10 deleted across control/reduced/pay_now)
and precisely on the cohort that most embodies connect-and-leave, since
deleting the account is the strongest form of it. Add withTrashed().

app/Services/Stats/ExperimentFunnelCollector.php

@@ -94,6 +94,10 @@ class ExperimentFunnelCollector
         $monthlyEquiv = $this->monthlyEquivByPriceId();
 
         User::query()
+            // Soft-deleted accounts still count: they were assigned a variant and
+            // their bank connections incurred real cost, and deleting the account
+            // is itself an experiment outcome (the strongest "connect and leave").
+            ->withTrashed()
             ->where('users.created_at', '>=', $startedAt)
             ->when($excluded !== [], fn ($query) => $query->whereNotIn('email', $excluded))
             ->with(['subscriptions' => fn ($query) => $query->where('type', 'default')])

tests/Feature/SendExperimentFunnelReportCommandTest.php

@@ -173,6 +173,21 @@ it('computes connection cost, wasted burn and contribution margin', function ()
         ->and($control['activationToPaidRate'])->toBe(0.5);     // 1 paid ÷ 2 activated
 });
 
+it('still counts soft-deleted users so their assignment and connection cost survive', function () {
+    $signup = CarbonImmutable::parse('2026-06-05');
+
+    $user = experimentUser(SubscriptionExperiment::CONTROL, $signup, null, connections: 2);
+    $user->delete(); // soft delete the account
+
+    $control = app(ExperimentFunnelCollector::class)->collect()['variants'][SubscriptionExperiment::CONTROL];
+
+    expect($control['assigned'])->toBe(1)
+        ->and($control['assignedMature'])->toBe(1)
+        ->and($control['activated'])->toBe(1)     // 2 connections
+        ->and($control['costCents'])->toBe(80)    // 2 × 40, still charged
+        ->and($control['wastedCostCents'])->toBe(80); // never paid → pure burn
+});
+
 it('reports a matured-cohort conversion capped at 100% and prints the matured denominator', function () {
     $signup = CarbonImmutable::parse('2026-06-05'); // control matures by the test clock