Calendar + NLP modules implemented

backend/modules/calendar/models.py

@@ -0,0 +1,18 @@
+# modules/calendar/models.py
+from sqlalchemy import Column, Integer, String, DateTime, ForeignKey
+from sqlalchemy.orm import relationship
+from core.database import Base
+
+class CalendarEvent(Base):
+    __tablename__ = "calendar_events"
+
+    id = Column(Integer, primary_key=True)
+    title = Column(String, nullable=False)
+    description = Column(String)
+    start = Column(DateTime, nullable=False)
+    end = Column(DateTime)
+    location = Column(String)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)  # <-- Relationship
+
+    # Bi-directional relationship (for eager loading)
+    user = relationship("User", back_populates="calendar_events")