feat: Add base project structure with API and web components

api/app/models/knowledgeshare_model.py

@@ -0,0 +1,24 @@
+import datetime
+import uuid
+from sqlalchemy import Column, Integer, String, JSON, DateTime, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+from app.db import Base
+from sqlalchemy.orm import relationship
+
+
+class KnowledgeShare(Base):
+    __tablename__ = "knowledge_shares"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True)
+    source_kb_id = Column(UUID(as_uuid=True), nullable=False, comment="source knowledges.id")
+    source_workspace_id = Column(UUID(as_uuid=True), nullable=False, comment="source workspaces.id")
+    target_kb_id = Column(UUID(as_uuid=True), ForeignKey('knowledges.id'), nullable=False, comment="target knowledges.id")
+    target_workspace_id = Column(UUID(as_uuid=True), ForeignKey('workspaces.id'), nullable=False, comment="target workspaces.id")
+    shared_by = Column(UUID(as_uuid=True), ForeignKey('users.id'), nullable=False, comment="shared users.id")
+    created_at = Column(DateTime, default=datetime.datetime.now)
+    updated_at = Column(DateTime, default=datetime.datetime.now)
+
+    # Relationships
+    target_kb = relationship("Knowledge", backref="target_kb")
+    target_workspace = relationship("Workspace", backref="target_workspace")
+    shared_user = relationship("User", backref="shared_user")