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>

lib/validations/index.ts

@@ -1,4 +1,5 @@
 import { z } from "zod"
+import { WEBHOOK_EVENT_IDS } from "@/lib/webhooks/events"
 
 export const propertySchema = z.object({
   name: z.string().min(1, "Property name is required").max(200),
@@ -71,6 +72,7 @@ export const leaseSchema = z.object({
   rent_amount: z.number().positive("Rent amount must be positive"),
   security_deposit: z.number().positive().optional(),
   lease_type: z.enum(["fixed", "month_to_month"]).default("fixed"),
+  status: z.enum(["active", "expired", "terminated", "renewed"]).optional(),
   auto_renew: z.boolean().default(false),
   notes: z.string().max(5000).optional(),
 })
@@ -122,6 +124,15 @@ export const followUpRuleSchema = z.object({
   message_template: z.string().max(5000).optional(),
 })
 
+// Outbound webhooks. `events` is the set of subscribed event ids; an empty array
+// means "all events". SSRF/host validation happens server-side (see lib/webhooks/ssrf).
+export const webhookEndpointSchema = z.object({
+  url: z.string().url("Enter a valid URL").max(2000),
+  description: z.string().max(200).optional().or(z.literal("")),
+  events: z.array(z.enum(WEBHOOK_EVENT_IDS as [string, ...string[]])).default([]),
+})
+
 export type ExpenseFormValues = z.infer<typeof expenseSchema>
 export type VendorFormValues = z.infer<typeof vendorSchema>
 export type InspectionFormValues = z.infer<typeof inspectionSchema>
+export type WebhookEndpointFormValues = z.infer<typeof webhookEndpointSchema>