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/(dashboard)/impact/page.tsx

@@ -3,6 +3,7 @@ import { and, desc, eq } from "drizzle-orm"
 import { db } from "@/lib/db"
 import { ai_recommendations, activity_log } from "@/lib/db/schema"
 import { getSessionUser } from "@/lib/session"
+import { getEffectiveOwnerId } from "@/lib/account"
 import { ImpactClient } from "./impact-client"
 
 export const metadata = { title: "AI Impact" }
@@ -11,15 +12,17 @@ export default async function ImpactPage() {
   const user = await getSessionUser()
   if (!user) redirect("/login")
 
+  const ownerId = await getEffectiveOwnerId(user.id)
+
   const [recs, activityRows] = await Promise.all([
     db
       .select()
       .from(ai_recommendations)
-      .where(eq(ai_recommendations.user_id, user.id)),
+      .where(eq(ai_recommendations.user_id, ownerId)),
     db
       .select()
       .from(activity_log)
-      .where(and(eq(activity_log.user_id, user.id), eq(activity_log.type, "ai_action")))
+      .where(and(eq(activity_log.user_id, ownerId), eq(activity_log.type, "ai_action")))
       .orderBy(desc(activity_log.created_at))
       .limit(20),
   ])