重构模型平台前后端并移除Redis依赖

migrations/versions/20260730_0004_remove_redis_lock_name.py

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+"""remove Redis-specific lock column naming
+
+Revision ID: 20260730_0004
+Revises: 20260728_0003
+Create Date: 2026-07-30
+"""
+
+from collections.abc import Sequence
+
+from alembic import context, op
+import sqlalchemy as sa
+
+revision: str = "20260730_0004"
+down_revision: str | None = "20260728_0003"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def _column_names() -> set[str]:
+    inspector = sa.inspect(op.get_bind())
+    return {item["name"] for item in inspector.get_columns("edit_sessions")}
+
+
+def upgrade() -> None:
+    if context.is_offline_mode():
+        return
+    columns = _column_names()
+    if "redis_lock_key" in columns and "lock_key" not in columns:
+        op.alter_column(
+            "edit_sessions",
+            "redis_lock_key",
+            new_column_name="lock_key",
+            existing_type=sa.String(length=512),
+            existing_nullable=False,
+        )
+
+
+def downgrade() -> None:
+    if context.is_offline_mode():
+        return
+    columns = _column_names()
+    if "lock_key" in columns and "redis_lock_key" not in columns:
+        op.alter_column(
+            "edit_sessions",
+            "lock_key",
+            new_column_name="redis_lock_key",
+            existing_type=sa.String(length=512),
+            existing_nullable=False,
+        )