优化任务列表性能和本地登录代理

web/backend/migrations/versions/20260805_0015_task_status_indexes.py

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+"""补充任务状态清理索引
+
+Revision ID: 20260805_0015
+Revises: 20260728_0014
+Create Date: 2026-08-05
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = "20260805_0015"
+down_revision: Union[str, None] = "20260728_0014"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+INDEXES = [
+    ("ix_douyu_tasks_status_id", "douyu_tasks", ["status", "id"]),
+    ("ix_huya_tasks_status_id", "huya_tasks", ["status", "id"]),
+]
+
+
+def _has_table(bind, table_name: str) -> bool:
+    return sa.inspect(bind).has_table(table_name)
+
+
+def _indexes(bind, table_name: str) -> set[str]:
+    if not _has_table(bind, table_name):
+        return set()
+    return {index["name"] for index in sa.inspect(bind).get_indexes(table_name)}
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    for name, table_name, columns in INDEXES:
+        if name not in _indexes(bind, table_name):
+            op.create_index(name, table_name, columns)
+
+
+def downgrade() -> None:
+    bind = op.get_bind()
+    for name, table_name, _ in reversed(INDEXES):
+        if name in _indexes(bind, table_name):
+            op.drop_index(name, table_name=table_name)