feat: 新增题图上传接口和排播接口

backend/app/models/schedule.py

@@ -0,0 +1,33 @@
+"""
+排期模型 — SQLModel
+"""
+
+from datetime import date, datetime
+
+from sqlalchemy import Column
+from sqlalchemy import DateTime as SADateTime
+from sqlalchemy import Integer as SAInteger
+from sqlalchemy import Date as SADate
+from sqlalchemy import Text
+from sqlalchemy.sql import func as sa_func
+from sqlmodel import Field, SQLModel
+
+
+class Schedule(SQLModel, table=True):
+    __tablename__ = "schedules"
+
+    id: int | None = Field(default=None, primary_key=True)
+    episode_id: int | None = Field(default=None, foreign_key="episodes.id")
+    planned_air_date: date
+    status: str = Field(default="planned", max_length=20)
+    editor_id: int | None = Field(default=None, foreign_key="users.id")
+    notes: str | None = Field(default=None)
+
+    created_at: datetime | None = Field(
+        default=None,
+        sa_column=Column(SADateTime(timezone=True), nullable=False, server_default=sa_func.now()),
+    )
+    updated_at: datetime | None = Field(
+        default=None,
+        sa_column=Column(SADateTime(timezone=True), nullable=False, server_default=sa_func.now()),
+    )