Deploy on DigitalOcean App Platform (GitHub-source build) + consolidate audit-fixes

Deploy config:
- .do/app.yaml: build the Dockerfile directly from GitHub (deploy_on_push) instead
  of a pre-built DOCR image; NEXT_PUBLIC_* set RUN_AND_BUILD_TIME with the
  propertymanagement.network domain so they bake into the client bundle; add
  custom domains block (apex + www); wire Sentry DSN (server + browser).

Included pending work from the audit-fixes branch:
- AI provider abstraction (OpenAI/Anthropic, admin-selectable; Anthropic default)
- Per-landlord e-signature (DocuSign OAuth + Dropbox Sign) + migration 0010
- Outbound webhooks / Zapier integration
- PayPal removal (Stripe-only billing)
- Storage hardening (fail-loud when Spaces unconfigured), security fixes

Verified: full production Docker build (same build-args as DO) passes clean.

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

app/api/documents/[id]/route.ts

@@ -44,7 +44,7 @@ export async function DELETE(_: Request, { params }: { params: Promise<{ id: str
   await db.delete(documents).where(and(eq(documents.id, id), eq(documents.user_id, ownerId)))
 
   if (doc.storage_path) {
-    await deleteFile(doc.storage_path)
+    await deleteFile(doc.storage_path, ownerId)
   }
 
   return NextResponse.json({ success: true })