perf: SQLite WAL + 复合索引 + GZip + scheduler jitter + 构建缓存

backend/app/models/notification_log.py

@@ -1,6 +1,6 @@
 from datetime import datetime, timezone
 from typing import Optional
-from sqlalchemy import Integer, String, DateTime, Text, ForeignKey
+from sqlalchemy import Index, Integer, String, DateTime, Text, ForeignKey, text
 from sqlalchemy.orm import mapped_column, Mapped
 from app.database import Base
 
@@ -19,3 +19,8 @@ class NotificationLog(Base):
     status: Mapped[str] = mapped_column(String(16), nullable=False)
     response_text: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
     created_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.now(timezone.utc), index=True)
+
+    __table_args__ = (
+        Index("ix_notif_event_created", "event_type", text("created_at DESC")),
+        Index("ix_notif_status_created", "status", text("created_at DESC")),
+    )

backend/app/models/snapshot.py

@@ -1,5 +1,5 @@
 from datetime import datetime, timezone
-from sqlalchemy import Integer, Text, DateTime, ForeignKey
+from sqlalchemy import Index, Integer, Text, DateTime, ForeignKey, text
 from sqlalchemy.orm import mapped_column, Mapped
 from app.database import Base
 
@@ -11,3 +11,7 @@ class UpstreamRateSnapshot(Base):
     upstream_id: Mapped[int] = mapped_column(Integer, ForeignKey("upstreams.id", ondelete="CASCADE"), index=True)
     snapshot_json: Mapped[str] = mapped_column(Text, nullable=False)
     captured_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.now(timezone.utc), index=True)
+
+    __table_args__ = (
+        Index("ix_snapshot_upstream_captured", "upstream_id", text("captured_at DESC")),
+    )

backend/app/models/upstream.py

@@ -1,6 +1,6 @@
 from datetime import datetime, timezone
 from typing import Optional
-from sqlalchemy import Integer, String, Boolean, DateTime, Text, Float
+from sqlalchemy import Index, Integer, String, Boolean, DateTime, Text, Float
 from sqlalchemy.orm import mapped_column, Mapped
 from app.database import Base
 
@@ -36,3 +36,7 @@ class Upstream(Base):
     updated_at: Mapped[datetime] = mapped_column(
         DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc)
     )
+
+    __table_args__ = (
+        Index("ix_upstream_enabled", "enabled"),
+    )

backend/app/models/upstream_key.py

@@ -1,7 +1,7 @@
 from datetime import datetime, timezone
 from typing import Optional
 
-from sqlalchemy import DateTime, ForeignKey, Integer, String, Text, UniqueConstraint
+from sqlalchemy import DateTime, ForeignKey, Index, Integer, String, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.database import Base
@@ -30,4 +30,5 @@ class UpstreamGeneratedKey(Base):
 
     __table_args__ = (
         UniqueConstraint("upstream_id", "group_id", "key_name", name="uq_upstream_group_key"),
+        Index("ix_key_upstream_name", "upstream_id", "key_name"),
     )

backend/app/models/website.py

@@ -1,7 +1,7 @@
 from datetime import datetime, timezone
 from typing import Optional
 
-from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String, Text
+from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, String, Text, text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.database import Base
@@ -66,3 +66,8 @@ class WebsiteSyncLog(Base):
     status: Mapped[str] = mapped_column(String(16), nullable=False)
     message: Mapped[str] = mapped_column(Text, default="")
     created_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.now(timezone.utc), index=True)
+
+    __table_args__ = (
+        Index("ix_sync_website_created", "website_id", text("created_at DESC")),
+        Index("ix_sync_binding_created", "binding_id", text("created_at DESC")),
+    )