added sleep logging workflow and overview page

src/baby_monitor/models/db/sleep.py

@@ -0,0 +1,27 @@
+"""Sleep database model."""
+
+from typing import TYPE_CHECKING
+from sqlalchemy import Column, Integer, DateTime, ForeignKey
+from datetime import datetime, UTC
+
+if TYPE_CHECKING:
+    from sqlalchemy.orm import DeclarativeBase
+
+    Base = DeclarativeBase
+else:
+    from baby_monitor.repositories.dependencies.get_database import Base
+
+
+class Sleep(Base):
+    """Sleep log database model."""
+
+    __tablename__ = "sleep_logs"
+
+    id = Column(Integer, primary_key=True, index=True)
+    child_id = Column(Integer, ForeignKey("children.id"), nullable=False)
+    start_time = Column(DateTime, nullable=False)
+    end_time = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, default=datetime.now(UTC), nullable=False)
+
+    def __repr__(self) -> str:
+        return f"<Sleep(id={self.id}, child_id={self.child_id})>"