add cache_key to workflows table (#3112)

skyvern/forge/sdk/db/models.py

@@ -239,7 +239,7 @@ class WorkflowModel(Base):
     model = Column(JSON, nullable=True)
     status = Column(String, nullable=False, default="published")
     use_cache = Column(Boolean, default=False, nullable=False)
-    cache_project_id = Column(String, nullable=True)
+    cache_key = Column(String, nullable=True)
 
     created_at = Column(DateTime, default=datetime.datetime.utcnow, nullable=False)
     modified_at = Column(