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

backend/app/models/school.py

@@ -0,0 +1,45 @@
+import uuid
+import enum
+from datetime import datetime, timezone
+from sqlalchemy import String, Boolean, DateTime, Enum as SAEnum, Text, Numeric, Integer
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from app.database import Base
+
+class SchoolStatus(str, enum.Enum):
+    active = "active"
+    suspended = "suspended"
+    expired = "expired"
+    pending = "pending"
+
+class LicenseTier(str, enum.Enum):
+    basic = "basic"
+    standard = "standard"
+    premium = "premium"
+
+class School(Base):
+    __tablename__ = "schools"
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    name: Mapped[str] = mapped_column(String(255), nullable=False)
+    slug: Mapped[str] = mapped_column(String(100), unique=True, nullable=False, index=True)
+    address: Mapped[str | None] = mapped_column(Text, nullable=True)
+    city: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    contact_name: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    contact_email: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    contact_phone: Mapped[str | None] = mapped_column(String(50), nullable=True)
+    billing_email: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    status: Mapped[SchoolStatus] = mapped_column(SAEnum(SchoolStatus), default=SchoolStatus.pending, nullable=False)
+    tier: Mapped[LicenseTier] = mapped_column(SAEnum(LicenseTier), default=LicenseTier.standard, nullable=False)
+    student_limit: Mapped[int] = mapped_column(Integer, default=500, nullable=False)
+    sms_sender_name: Mapped[str] = mapped_column(String(11), default="SCHOOL", nullable=False)
+    sms_credits: Mapped[float] = mapped_column(Numeric(12, 2), default=0.0, nullable=False)
+    sms_credit_low_threshold: Mapped[int] = mapped_column(Integer, default=50, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
+    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
+
+    admins: Mapped[list["HubUser"]] = relationship("HubUser", back_populates="school")
+    license: Mapped["License | None"] = relationship("License", back_populates="school", uselist=False)
+    sms_jobs: Mapped[list["SmsJob"]] = relationship("SmsJob", back_populates="school")
+    invoices: Mapped[list["Invoice"]] = relationship("Invoice", back_populates="school")
+    tickets: Mapped[list["SupportTicket"]] = relationship("SupportTicket", back_populates="school")
+    audit_logs: Mapped[list["AuditLog"]] = relationship("AuditLog", back_populates="school")