feat(stats): add --no-discord flag to stats:experiment-funnel (#606)

## What

Adds a `--no-discord` flag to `stats:experiment-funnel` so the
per-variant report can be run **on demand (e.g. in production) and only
printed to the console**, without posting to the Discord channel.

```bash
php artisan stats:experiment-funnel --no-discord
```

## Why

Handy for ad-hoc checks of the live experiment without spamming the
ops/Stripe Discord channel. The scheduled weekly run (and any run
without the flag) still posts to Discord exactly as before — default
behaviour is unchanged.

## Notes
- The console table already prints before the Discord step; the flag
just short-circuits the `->send()` and prints `Skipped Discord
(--no-discord).`
- Test added: with `--no-discord`, the command succeeds, prints the
table, and `Http::assertNothingSent()`.
- Pint + Larastan + the command's Pest suite green.

> Tip: the command queries the default DB connection, so to see
**production** numbers run it inside the prod container (e.g. via the
Coolify terminal).

app/Console/Commands/SendExperimentFunnelReportCommand.php

@@ -10,7 +10,7 @@ use Illuminate\Console\Command;
 
 class SendExperimentFunnelReportCommand extends Command
 {
-    protected $signature = 'stats:experiment-funnel';
+    protected $signature = 'stats:experiment-funnel {--no-discord : Print the report to the console only, without posting to Discord}';
 
     protected $description = 'Post the trial/pricing experiment funnel (per variant) to Discord';
 
@@ -39,6 +39,12 @@ class SendExperimentFunnelReportCommand extends Command
             $this->line($line);
         }
 
+        if ($this->option('no-discord')) {
+            $this->info('Skipped Discord (--no-discord).');
+
+            return self::SUCCESS;
+        }
+
         $webhookUrl = config('services.discord.ai_cohort_webhook_url')
             ?: config('services.discord.webhook_url');
 

tests/Feature/SendExperimentFunnelReportCommandTest.php

@@ -168,3 +168,19 @@ it('does not post when the experiment has not started', function () {
 
     Http::assertNothingSent();
 });
+
+it('prints the report without posting to discord when --no-discord is set', function () {
+    config(['services.discord.ai_cohort_webhook_url' => 'https://discord.test/hook']);
+    Http::fake(['discord.test/*' => Http::response('', 204)]);
+
+    experimentUser(SubscriptionExperiment::CONTROL, CarbonImmutable::parse('2026-06-05'), [
+        'status' => 'active',
+        'at' => CarbonImmutable::parse('2026-06-05'),
+    ]);
+
+    artisan('stats:experiment-funnel', ['--no-discord' => true])
+        ->expectsOutputToContain('control')
+        ->assertSuccessful();
+
+    Http::assertNothingSent();
+});