feat(stats): surface revenue-map gaps in the price experiment report

The collector now returns the price ids that carried net-active subscriptions but
were missing from the monthly-equivalent map, and the report prints a loud warning
(Stripe unreachable, or unmapped prices undercounting MRR as 0) where the
decision-maker reads it — previously this only went to the logs, so an unsynced
arm price with no current payers could bias CM unnoticed.

app/Console/Commands/SendPriceExperimentFunnelReportCommand.php

@@ -46,7 +46,7 @@ class SendPriceExperimentFunnelReportCommand extends Command
             return self::SUCCESS;
         }
 
-        foreach ([...$this->tableLines($report), ...$this->srmLines($report), ...$this->significanceLines($report)] as $line) {
+        foreach ([...$this->tableLines($report), ...$this->integrityLines($report), ...$this->srmLines($report), ...$this->significanceLines($report)] as $line) {
             $this->line($line);
         }
 
@@ -103,6 +103,35 @@ class SendPriceExperimentFunnelReportCommand extends Command
         return $lines;
     }
 
+    /**
+     * Revenue-map integrity warnings, surfaced in the report the decision-maker
+     * reads (not just the logs): Stripe unreachable, or net-active subscriptions on
+     * price ids missing from the monthly-equivalent map — which would silently
+     * undercount MRR/CM as 0 and bias the comparison against whichever arm's price
+     * is unmapped. Empty (no lines) when everything resolves.
+     *
+     * @param  array{revenueAvailable: bool, unmappedPriceIds: list<string>}  $report
+     * @return list<string>
+     */
+    private function integrityLines(array $report): array
+    {
+        $lines = [];
+
+        if (! $report['revenueAvailable']) {
+            $lines[] = '';
+            $lines[] = '⚠ REVENUE UNAVAILABLE — Stripe prices could not be loaded; MRR/CM are blank this run.';
+        }
+
+        if (($report['unmappedPriceIds'] ?? []) !== []) {
+            $lines[] = '';
+            $lines[] = '⚠ UNMAPPED PRICES — net-active subs on price ids absent from the revenue map '
+                .'(MRR undercounted as 0): '.implode(', ', $report['unmappedPriceIds'])
+                .'. Confirm both arm prices are synced under the pro product (stripe:sync-prices).';
+        }
+
+        return $lines;
+    }
+
     /**
      * Sample-ratio-mismatch check: the split must be ~50/50. A low p means the
      * assignment (or the pipeline that filters it) is broken, which invalidates
@@ -238,14 +267,14 @@ class SendPriceExperimentFunnelReportCommand extends Command
     }
 
     /**
-     * @param  array{startedAt: CarbonImmutable, currency: string, revenueAvailable: bool, costPerConnectionCents: int, decisionWindowDays: int, variants: array<string, array<string, mixed>>}  $report
+     * @param  array{startedAt: CarbonImmutable, currency: string, revenueAvailable: bool, costPerConnectionCents: int, decisionWindowDays: int, unmappedPriceIds: list<string>, variants: array<string, array<string, mixed>>}  $report
      * @return array<string, mixed>
      */
     private function buildEmbed(array $report): array
     {
         return [
             'title' => '💶 Price Experiment — Funnel (control vs high)',
-            'description' => "```\n".implode("\n", [...$this->tableLines($report), ...$this->srmLines($report), ...$this->significanceLines($report)])."\n```",
+            'description' => "```\n".implode("\n", [...$this->tableLines($report), ...$this->integrityLines($report), ...$this->srmLines($report), ...$this->significanceLines($report)])."\n```",
             'color' => 0x57F287,
             'fields' => [
                 [

app/Services/Stats/PriceExperimentFunnelCollector.php

@@ -47,6 +47,7 @@ class PriceExperimentFunnelCollector
      *     revenueAvailable: bool,
      *     costPerConnectionCents: int,
      *     decisionWindowDays: int,
+     *     unmappedPriceIds: list<string>,
      *     variants: array<string, array{
      *         assigned: int, activated: int, subscribed: int,
      *         assignedMature: int, activatedMature: int, convertedMature: int, activeMature: int,
@@ -76,6 +77,7 @@ class PriceExperimentFunnelCollector
                 'revenueAvailable' => false,
                 'costPerConnectionCents' => $costPerConnectionCents,
                 'decisionWindowDays' => $window,
+                'unmappedPriceIds' => [],
                 'variants' => $variants,
             ];
         }
@@ -209,6 +211,7 @@ class PriceExperimentFunnelCollector
             'revenueAvailable' => $monthlyEquiv !== [],
             'costPerConnectionCents' => $costPerConnectionCents,
             'decisionWindowDays' => $window,
+            'unmappedPriceIds' => array_keys($missingPrices),
             'variants' => $variants,
         ];
     }

tests/Feature/SendPriceExperimentFunnelReportCommandTest.php

@@ -7,6 +7,7 @@ use App\Models\User;
 use App\Services\Stats\PriceExperimentFunnelCollector;
 use Carbon\CarbonImmutable;
 use Illuminate\Support\Carbon;
+use Illuminate\Support\Facades\Artisan;
 use Illuminate\Support\Facades\Cache;
 use Illuminate\Support\Facades\Http;
 use Illuminate\Support\Str;
@@ -175,6 +176,19 @@ it('prints the primary CM/user (Welch) and conversion guardrail blocks', functio
         ->assertSuccessful();
 });
 
+it('surfaces an unmapped-price warning in the report, not just the logs', function () {
+    $signup = CarbonImmutable::parse('2026-06-05');
+
+    // Net-active sub on a price id the seeded map does not know → MRR silently 0.
+    priceUser(PriceExperiment::HIGH, $signup, ['status' => 'active', 'at' => $signup, 'price' => 'price_rotated_old']);
+
+    Artisan::call('stats:price-experiment-funnel', ['--no-discord' => true]);
+    $output = Artisan::output();
+
+    expect($output)->toContain('UNMAPPED PRICES')
+        ->and($output)->toContain('price_rotated_old');
+});
+
 it('flags a sample-ratio mismatch when the assignment split is lopsided', function () {
     $signup = CarbonImmutable::parse('2026-06-05');