feat: 修复代码审核报告问题

models.py

@@ -0,0 +1,109 @@
+"""SQLAlchemy 数据模型"""
+from datetime import datetime, timezone
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, Float, ForeignKey, JSON
+from sqlalchemy.orm import relationship
+
+from database import Base
+
+
+def _utc_now():
+    return datetime.now(timezone.utc)
+
+
+class EnrichedArticle(Base):
+    """加工后的文章，存储 AI 摘要、分类、标签、分数和去重信息"""
+
+    __tablename__ = "articles_enriched"
+
+    id = Column(Integer, primary_key=True, index=True)
+    rk_article_id = Column(Integer, unique=True, nullable=False, index=True)
+
+    title = Column(String(1024), default="", index=True)
+    link = Column(String(2048), default="", index=True)
+    feed_id = Column(Integer, nullable=False, index=True)
+    feed_title = Column(String(512), default="")
+    feed_category = Column(String(128), default="")
+    author = Column(String(256), default="")
+
+    published_at = Column(DateTime, nullable=True, index=True)
+    fetched_at = Column(DateTime, default=_utc_now, index=True)
+
+    original_summary = Column(Text, default="")
+    content = Column(Text, default="")
+    ai_summary = Column(Text, default="")
+
+    category = Column(String(128), default="", index=True)
+    tags = Column(JSON, default=lambda: list())
+
+    heat_score = Column(Float, default=0.0)
+    importance_score = Column(Float, default=0.0)
+    duplication_score = Column(Float, default=0.0)
+    composite_score = Column(Float, default=0.0)
+
+    duplicate_group_id = Column(Integer, ForeignKey("duplicate_groups.id", ondelete="SET NULL"), nullable=True, index=True)
+    is_representative = Column(Boolean, default=False, index=True)
+
+    brief_date = Column(String(10), default="", index=True)
+
+    created_at = Column(DateTime, default=_utc_now)
+    updated_at = Column(DateTime, default=_utc_now, onupdate=_utc_now)
+
+    duplicate_group = relationship("DuplicateGroup", back_populates="articles")
+
+
+class Taxonomy(Base):
+    """分类、标签、打分规则表"""
+
+    __tablename__ = "taxonomy"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(128), nullable=False, index=True)
+    kind = Column(String(32), nullable=False, index=True)  # category/tag/heat_rule/importance_rule/duplication_rule
+    description = Column(Text, default="")
+    keywords = Column(JSON, default=list)  # 关键词或规则列表
+    weight = Column(Float, default=1.0)
+    created_by_ai = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=_utc_now)
+
+
+class DuplicateGroup(Base):
+    """重复文章组"""
+
+    __tablename__ = "duplicate_groups"
+
+    id = Column(Integer, primary_key=True, index=True)
+    representative_article_id = Column(Integer, ForeignKey("articles_enriched.id", ondelete="SET NULL"), nullable=True)
+    member_article_ids = Column(JSON, default=lambda: list())
+    similarity_matrix = Column(JSON, default=lambda: dict())
+    brief_date = Column(String(10), default="", index=True)
+    created_at = Column(DateTime, default=_utc_now)
+
+    articles = relationship("EnrichedArticle", back_populates="duplicate_group")
+
+
+class DailyBrief(Base):
+    """每日简报"""
+
+    __tablename__ = "daily_briefs"
+
+    id = Column(Integer, primary_key=True, index=True)
+    brief_date = Column(String(10), unique=True, nullable=False, index=True)
+    total_articles = Column(Integer, default=0)
+    unique_articles = Column(Integer, default=0)
+    by_category = Column(JSON, default=lambda: dict())
+    markdown_path = Column(String(512), default="")
+    created_at = Column(DateTime, default=_utc_now)
+    updated_at = Column(DateTime, default=_utc_now, onupdate=_utc_now)
+
+
+class AppSetting(Base):
+    """运行时配置表"""
+
+    __tablename__ = "app_settings"
+
+    id = Column(Integer, primary_key=True, index=True)
+    key = Column(String(128), unique=True, nullable=False, index=True)
+    value = Column(Text, default="")
+    description = Column(Text, default="")
+    is_sensitive = Column(Boolean, default=False)
+    updated_at = Column(DateTime, default=_utc_now, onupdate=_utc_now)