fix: retain plugin lifecycle ownership and recover installation state (#7146)

* fix: retain plugin lifecycle ownership and recover installation state

* test: cover plugin rollback and uninstall lifecycle boundaries

---------

Co-authored-by: jxxghp <jxxghp@gmail.com>

database/versions/b8d2f5a01962_plugin_data_identity.py

@@ -0,0 +1,48 @@
+"""
+合并插件同键旧重复数据，并为安装补偿保留本体启用位快照。
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = "b8d2f5a01962"
+down_revision = "e6a4c9f20813"
+branch_labels = None
+depends_on = None
+
+
+_INDEX = "ix_plugindata_plugin_id_key"
+
+
+def upgrade() -> None:
+    """
+    保留原同步读取最先可见的最低ID记录，去除其余同插件同键重复行后创建唯一索引。
+    """
+    connection = op.get_bind()
+    table = sa.table("plugindata", sa.column("id", sa.Integer), sa.column("plugin_id", sa.String),
+                     sa.column("key", sa.String))
+    keep_ids = sa.select(sa.func.min(table.c.id)).group_by(table.c.plugin_id, table.c.key)
+    connection.execute(table.delete().where(table.c.id.not_in(keep_ids)))
+    indexes = {index["name"]: index for index in sa.inspect(connection).get_indexes("plugindata")}
+    if _INDEX in indexes and not indexes[_INDEX].get("unique"):
+        op.drop_index(_INDEX, table_name="plugindata")
+    if _INDEX not in indexes or not indexes[_INDEX].get("unique"):
+        op.create_index(_INDEX, "plugindata", ["plugin_id", "key"], unique=True)
+    if "plugininstallation" in sa.inspect(connection).get_table_names():
+        columns = {column["name"] for column in sa.inspect(connection).get_columns("plugininstallation")}
+        if "host_enabled_before" not in columns:
+            # 旧journal无法推断被提前覆盖的启用位，保留NULL表示需人工复核。
+            op.add_column("plugininstallation", sa.Column("host_enabled_before", sa.Boolean, nullable=True))
+
+
+def downgrade() -> None:
+    """
+    恢复非唯一索引；升级已合并的旧重复值不重新制造。
+    """
+    connection = op.get_bind()
+    if "plugininstallation" in sa.inspect(connection).get_table_names():
+        columns = {column["name"] for column in sa.inspect(connection).get_columns("plugininstallation")}
+        if "host_enabled_before" in columns:
+            op.drop_column("plugininstallation", "host_enabled_before")
+    op.drop_index(_INDEX, table_name="plugindata")
+    op.create_index(_INDEX, "plugindata", ["plugin_id", "key"], unique=False)