Consolidate audit-fixes branch: webhooks, integrations, and deploy hardening

Batch commit of the pending working tree on security/audit-fixes-2026-07.
Major areas:
- Outbound webhooks / Zapier: schema + signed delivery with retries, public
  v1 API (REST-hook subscribe/unsubscribe), settings UI, cron drain.
- Deploy hardening: email via SMTP2GO (Resend fully removed), verified DB TLS
  (DATABASE_SSL=require + DATABASE_CA), storage fails loud in production when
  Spaces is unconfigured instead of silently using ephemeral disk.
- Integrations & features (concurrent work): accounting (QuickBooks/Xero),
  e-signature (DocuSign/Dropbox Sign), PayPal, geocoding/maps, onboarding,
  expanded legal pages.
- DB migrations 0006–0009.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/(auth)/forgot-password/page.tsx

@@ -1,5 +1,6 @@
 import Link from "next/link"
 import { Logo } from "@/components/shared/logo"
+import { TurnstileWidget } from "@/components/shared/turnstile-widget"
 import { resetPassword } from "@/app/actions/auth"
 
 export default async function ForgotPasswordPage({
@@ -49,6 +50,8 @@ export default async function ForgotPasswordPage({
             />
           </div>
 
+          <TurnstileWidget />
+
           <button
             type="submit"
             className="w-full rounded-lg bg-indigo-600 px-4 py-2.5 text-sm font-semibold text-white transition hover:bg-indigo-500 active:scale-[0.98]"