feat(fase3): add QuickReply database model

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/api-gateway/app/models/quick_reply.py

@@ -0,0 +1,21 @@
+import uuid
+from datetime import datetime
+from sqlalchemy import Column, String, Text, ForeignKey, DateTime
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+from sqlalchemy.orm import relationship
+from app.core.database import Base
+
+
+class QuickReply(Base):
+    __tablename__ = "quick_replies"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    shortcut = Column(String(50), nullable=False, index=True)
+    content = Column(Text, nullable=False)
+    attachments = Column(JSONB, default=list)
+    queue_id = Column(UUID(as_uuid=True), ForeignKey("queues.id"), nullable=True)
+    created_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+
+    queue = relationship("Queue")
+    creator = relationship("User")