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/search/route.ts

@@ -3,11 +3,14 @@ import { and, eq, ilike, or } from "drizzle-orm"
 import { db } from "@/lib/db"
 import { tenants, properties, maintenance_requests } from "@/lib/db/schema"
 import { getSessionUser } from "@/lib/session"
+import { getEffectiveOwnerId } from "@/lib/account"
 
 export async function GET(req: NextRequest) {
   const user = await getSessionUser()
   if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
 
+  const ownerId = await getEffectiveOwnerId(user.id)
+
   const q = req.nextUrl.searchParams.get("q")?.trim() ?? ""
   if (q.length < 2) return NextResponse.json({ tenants: [], properties: [], maintenance: [] })
 
@@ -25,7 +28,7 @@ export async function GET(req: NextRequest) {
       .from(tenants)
       .where(
         and(
-          eq(tenants.user_id, user.id),
+          eq(tenants.user_id, ownerId),
           or(ilike(tenants.first_name, like), ilike(tenants.last_name, like), ilike(tenants.email, like))
         )
       )
@@ -40,7 +43,7 @@ export async function GET(req: NextRequest) {
       .from(properties)
       .where(
         and(
-          eq(properties.user_id, user.id),
+          eq(properties.user_id, ownerId),
           or(ilike(properties.name, like), ilike(properties.address_line1, like), ilike(properties.city, like))
         )
       )
@@ -53,7 +56,7 @@ export async function GET(req: NextRequest) {
         priority: maintenance_requests.priority,
       })
       .from(maintenance_requests)
-      .where(and(eq(maintenance_requests.user_id, user.id), ilike(maintenance_requests.title, like)))
+      .where(and(eq(maintenance_requests.user_id, ownerId), ilike(maintenance_requests.title, like)))
       .limit(5),
   ])