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/api/v1/payments/route.ts

@@ -0,0 +1,90 @@
+import { NextResponse } from "next/server"
+import { and, desc, eq, gte, lte } from "drizzle-orm"
+import { db } from "@/lib/db"
+import { rent_payments } from "@/lib/db/schema"
+import { rentPaymentSchema } from "@/lib/validations"
+import { ownsProperty, ownsUnit, ownsTenant } from "@/lib/db/ownership"
+import { resolveApiRequest } from "@/lib/api-auth"
+import { emitWebhookEvent } from "@/lib/webhooks/emit"
+
+// Public REST API (v1) — rent payments. Bearer API-key auth. Maps to the
+// rent_payments table / internal /api/rent logic. Scoped by resolved owner id.
+
+const unauthorized = () =>
+  NextResponse.json({ error: { code: 401, message: "Unauthorized" } }, { status: 401 })
+const forbidden = () =>
+  NextResponse.json({ error: { code: 403, message: "Forbidden" } }, { status: 403 })
+
+const VALID_STATUSES = ["pending", "paid", "overdue", "partial", "waived"]
+
+export async function GET(request: Request) {
+  const ctx = await resolveApiRequest(request)
+  if (!ctx) return unauthorized()
+
+  const { searchParams } = new URL(request.url)
+  const status = searchParams.get("status")
+  const tenantId = searchParams.get("tenant_id")
+  // Date-range filter on the payment's due_date ("YYYY-MM-DD").
+  const from = searchParams.get("from")
+  const to = searchParams.get("to")
+
+  if (status && !VALID_STATUSES.includes(status)) {
+    return NextResponse.json(
+      { error: { code: 400, message: "Invalid status" } },
+      { status: 400 }
+    )
+  }
+
+  const data = await db.query.rent_payments.findMany({
+    where: and(
+      eq(rent_payments.user_id, ctx.ownerId),
+      status ? eq(rent_payments.status, status as typeof rent_payments.$inferSelect.status) : undefined,
+      tenantId ? eq(rent_payments.tenant_id, tenantId) : undefined,
+      from ? gte(rent_payments.due_date, from) : undefined,
+      to ? lte(rent_payments.due_date, to) : undefined
+    ),
+    with: {
+      tenant: { columns: { first_name: true, last_name: true, email: true } },
+      property: { columns: { name: true } },
+      unit: { columns: { unit_number: true } },
+    },
+    orderBy: desc(rent_payments.due_date),
+  })
+
+  return NextResponse.json({ data, count: data.length })
+}
+
+export async function POST(request: Request) {
+  const ctx = await resolveApiRequest(request)
+  if (!ctx) return unauthorized()
+  if (!ctx.canWrite) return forbidden()
+
+  const body = await request.json().catch(() => null)
+  const parsed = rentPaymentSchema.safeParse(body)
+  if (!parsed.success) {
+    return NextResponse.json(
+      { error: { code: 400, message: parsed.error.flatten() } },
+      { status: 400 }
+    )
+  }
+
+  if (
+    !(await ownsProperty(ctx.ownerId, parsed.data.property_id)) ||
+    !(await ownsUnit(ctx.ownerId, parsed.data.unit_id)) ||
+    !(await ownsTenant(ctx.ownerId, parsed.data.tenant_id))
+  ) {
+    return forbidden()
+  }
+
+  const [data] = await db
+    .insert(rent_payments)
+    .values({ ...parsed.data, user_id: ctx.ownerId })
+    .returning()
+
+  await emitWebhookEvent({ ownerId: ctx.ownerId, event: "payment.recorded", data: { payment: data } })
+  if (data.status === "paid") {
+    await emitWebhookEvent({ ownerId: ctx.ownerId, event: "payment.paid", data: { payment: data } })
+  }
+
+  return NextResponse.json({ data }, { status: 201 })
+}