feat: Add base project structure with API and web components

api/app/models/memory_increment_model.py

@@ -0,0 +1,18 @@
+import uuid
+import datetime
+from sqlalchemy import Column, ForeignKey, Integer, Date, DateTime
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import relationship
+from app.db import Base
+
+class MemoryIncrement(Base):
+    __tablename__ = "memory_increments"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True)
+    workspace_id = Column(UUID(as_uuid=True), ForeignKey("workspaces.id"), index=True, nullable=False)
+    total_num = Column(Integer, default=0, nullable=False)
+    created_at = Column(DateTime, default=datetime.datetime.now)
+    updated_at = Column(DateTime, default=datetime.datetime.now, onupdate=datetime.datetime.now)
+
+    # 与 App 的关系（指向映射类名，而非表名）
+    workspace = relationship("Workspace", back_populates="memory_increments")