feat: Add job model

app/db/models/job.py

@@ -0,0 +1,43 @@
+import uuid
+from datetime import datetime
+from typing import Any, Dict, Optional
+from sqlalchemy import String, Integer, DateTime, JSON, func
+from sqlalchemy.orm import Mapped, mapped_column
+from app.db.base import Base
+
+
+class Job(Base):
+    __tablename__ = "jobs"
+
+    id: Mapped[str] = mapped_column(
+        String(36),
+        primary_key=True,
+        default=lambda: str(uuid.uuid4()),
+        index=True,
+    )
+    filename: Mapped[str] = mapped_column(String(255), nullable=False)
+    status: Mapped[str] = mapped_column(
+        String(50),
+        default="pending",
+        index=True,
+    )
+    row_count: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        nullable=False,
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now(),
+        nullable=False,
+    )
+    summary: Mapped[Optional[Dict[str, Any]]] = mapped_column(
+        JSON,
+        nullable=True,
+    )
+    results: Mapped[Optional[Dict[str, Any]]] = mapped_column(
+        JSON,
+        nullable=True,
+    )