feat: Complete MVP implementation of Linux BenchTools

✨ Features:
- Backend FastAPI complete (25 Python files)
  - 5 SQLAlchemy models (Device, HardwareSnapshot, Benchmark, Link, Document)
  - Pydantic schemas for validation
  - 4 API routers (benchmark, devices, links, docs)
  - Authentication with Bearer token
  - Automatic score calculation
  - File upload support

- Frontend web interface (13 files)
  - 4 HTML pages (Dashboard, Devices, Device Detail, Settings)
  - 7 JavaScript modules
  - Monokai dark theme CSS
  - Responsive design
  - Complete CRUD operations

- Client benchmark script (500+ lines Bash)
  - Hardware auto-detection
  - CPU, RAM, Disk, Network benchmarks
  - JSON payload generation
  - Robust error handling

- Docker deployment
  - Optimized Dockerfile
  - docker-compose with 2 services
  - Persistent volumes
  - Environment variables

- Documentation & Installation
  - Automated install.sh script
  - README, QUICKSTART, DEPLOYMENT guides
  - Complete API documentation
  - Project structure documentation

📊 Stats:
- ~60 files created
- ~5000 lines of code
- Full MVP feature set implemented

🚀 Ready for production deployment!

🤖 Generated with Claude Code
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/app/models/document.py

@@ -0,0 +1,30 @@
+"""
+Linux BenchTools - Document Model
+"""
+
+from sqlalchemy import Column, Integer, String, DateTime, ForeignKey
+from sqlalchemy.orm import relationship
+from datetime import datetime
+from app.db.base import Base
+
+
+class Document(Base):
+    """
+    Uploaded documents associated with a device
+    """
+    __tablename__ = "documents"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    device_id = Column(Integer, ForeignKey("devices.id"), nullable=False, index=True)
+    doc_type = Column(String(50), nullable=False)  # manual, warranty, invoice, photo, other
+    filename = Column(String(255), nullable=False)
+    stored_path = Column(String(512), nullable=False)
+    mime_type = Column(String(100), nullable=False)
+    size_bytes = Column(Integer, nullable=False)
+    uploaded_at = Column(DateTime, nullable=False, default=datetime.utcnow)
+
+    # Relationships
+    device = relationship("Device", back_populates="documents")
+
+    def __repr__(self):
+        return f"<Document(id={self.id}, device_id={self.device_id}, filename='{self.filename}')>"