feat(phase-1): TapTrack Hub initial scaffold

Full project scaffold for TapTrack Hub — cloud SaaS control plane
for managing on-prem TapTrack school deployments.

## Infrastructure
- Docker Compose: backend (gunicorn+uvicorn), Celery worker + beat,
  frontend (Vite build + nginx), PostgreSQL 15, Redis 7, nginx proxy
- Dockerfile for backend and frontend, nginx reverse proxy config

## Backend (FastAPI + SQLAlchemy async + Celery)
Database schema (10 tables):
  hub_users, schools, licenses, sms_jobs, sms_credit_ledger,
  invoices, invoice_line_items, school_subscriptions,
  support_tickets, ticket_replies, audit_logs, announcements

Auth: JWT (python-jose) + bcrypt + role-based FastAPI dependencies
  (get_current_user, require_super_admin, require_school_admin)

Routers (11): auth, schools, licenses, sms, billing, tickets,
  users, dashboard, school_portal, announcements, sync

Celery tasks (6):
  sms.process_queue, billing.generate_monthly_invoices,
  billing.send_invoice_email, billing.check_overdue,
  license.check_expiry, reports.send_monthly_reports

Services: SMTP email helper (smtplib + Jinja2)
Seed script: creates super admin admin@taptrack.io

## Frontend (Vue 3 + Vite + Pinia + Tailwind CSS)
Router: 14 routes across super admin + school portal layouts
Stores: Pinia auth store with localStorage persistence
API client: full axios client for all backend endpoints
Layouts: AppLayout (super admin), PortalLayout (school), AuthLayout
Components: AppSidebar, PortalSidebar, SidebarItem, KpiCard,
  StatusBadge, ToastStack
Pages: Login, Dashboard, Schools, SchoolDetail, Licenses, SMS,
  Billing, Tickets, TicketDetail, Users, Announcements, 404
Portal pages: Overview, Billing, SMS Reports, Tickets, Profile

## PAUL Planning Files
- .paul/ROADMAP.md: full 15-phase roadmap with detailed scope
- .paul/STATE.md: current position, tech stack, architecture notes
- .paul/phases/01-setup/01-PLAN.md: complete Phase 1 plan (done)
- .paul/phases/02 through 15: README stubs for all future phases

nginx/nginx.conf

@@ -0,0 +1,34 @@
+events { worker_connections 1024; }
+
+http {
+  include       /etc/nginx/mime.types;
+  default_type  application/octet-stream;
+  sendfile      on;
+  gzip          on;
+  gzip_types    text/plain text/css application/json application/javascript text/xml application/xml image/svg+xml;
+
+  upstream backend  { server backend:8000; }
+  upstream frontend { server frontend:80; }
+
+  server {
+    listen 80;
+    server_name _;
+    client_max_body_size 20M;
+
+    # API
+    location /api/ {
+      proxy_pass         http://backend;
+      proxy_set_header   Host $host;
+      proxy_set_header   X-Real-IP $remote_addr;
+      proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
+      proxy_read_timeout 120s;
+    }
+
+    # Frontend SPA
+    location / {
+      proxy_pass         http://frontend;
+      proxy_set_header   Host $host;
+      proxy_set_header   X-Real-IP $remote_addr;
+    }
+  }
+}