Refactored DB schema. Channels table to have uuid as primary key. Modified endpoints accordingly

app/models/db.py

@@ -1,5 +1,7 @@
 from datetime import datetime, timezone
-from sqlalchemy import Column, String, JSON, DateTime
+import uuid
+from sqlalchemy import Column, String, JSON, DateTime, UniqueConstraint
+from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.ext.declarative import declarative_base
 
 Base = declarative_base()
@@ -8,10 +10,15 @@ class ChannelDB(Base):
     """SQLAlchemy model for IPTV channels"""
     __tablename__ = "channels"
 
-    tvg_id = Column(String, primary_key=True)
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    tvg_id = Column(String, nullable=False)
     name = Column(String, nullable=False)
-    group_title = Column(String)
+    group_title = Column(String, nullable=False)
     tvg_name = Column(String)
+
+    __table_args__ = (
+        UniqueConstraint('group_title', 'name', name='uix_group_title_name'),
+    )
     tvg_logo = Column(String)
     urls = Column(JSON)  # Stores list of URLs as JSON
     created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))