Enhance verification system with multi-provider support and alt-account detection

- Added support for multiple captcha providers including Google reCAPTCHA (v2 and v3), hCaptcha, and Cloudflare Turnstile.
- Introduced new fields in the verification configuration for selecting captcha providers and enabling alt-account detection.
- Implemented logic to handle verification attempts and flag potential alt accounts based on IP and invite code analysis.
- Updated environment configuration to include necessary keys for captcha providers.
- Enhanced the user interface to allow selection of captcha providers in the verification setup.
- Improved backend handling of verification records to store additional data related to captcha provider usage.

apps/webui/src/app/api/guilds/[guildId]/verification/route.ts

@@ -13,8 +13,8 @@ export async function GET(_request: NextRequest, { params }: RouteParams) {
   const { guildId } = await params;
   try {
     await requireGuildAccess(guildId);
-    const config = await getVerificationDashboard(guildId);
-    return NextResponse.json(config);
+    const payload = await getVerificationDashboard(guildId);
+    return NextResponse.json(payload);
   } catch (error) {
     return toApiErrorResponse(error);
   }
@@ -28,15 +28,19 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
     const patch = VerificationConfigDashboardPatchSchema.parse(body);
 
     const before = await getVerificationDashboard(guildId);
-    const after = await updateVerificationDashboard(guildId, patch);
+    const afterConfig = await updateVerificationDashboard(guildId, patch);
+    const after = {
+      config: afterConfig,
+      availableCaptchaProviders: before.availableCaptchaProviders
+    };
 
     await writeDashboardAudit(prisma, {
       guildId,
       actorUserId: session.user.id,
       action: 'verification.update',
       path: `/dashboard/${guildId}/verification`,
-      before,
-      after
+      before: before.config,
+      after: afterConfig
     });
 
     return NextResponse.json(after);