feat(configdb): ReviewRemediationIndexes migration — AuditLog (Kind, Actor) + AuditLogEntries composite indexes

AuditLog indexes are raw SQL ON ps_AuditLog_Month so they stay partition-aligned for the switch purge.

docs/plans/sql/ReviewRemediationIndexes.sql

@@ -0,0 +1,71 @@
+-- ReviewRemediationIndexes (2026-10-22). Run with QUOTED_IDENTIFIER ON (sqlcmd -I, or keep
+-- this header): AuditLog has persisted computed columns / filtered indexes and SQL Server
+-- raises error 1934 otherwise.
+-- AuditLog is monthly-partitioned; the two AuditLog indexes are created ON
+-- ps_AuditLog_Month(OccurredAtUtc) so they stay partition-aligned and the partition-switch
+-- purge keeps working. Building them scans the whole AuditLog: on a large production table
+-- run in a quiet window, and on Enterprise edition add WITH (ONLINE = ON) to the two
+-- AuditLog CREATE INDEX statements (and to the AuditLogEntries ones if that table is large).
+SET QUOTED_IDENTIFIER ON;
+SET ANSI_NULLS ON;
+GO
+
+BEGIN TRANSACTION;
+IF NOT EXISTS (
+    SELECT * FROM [__EFMigrationsHistory]
+    WHERE [MigrationId] = N'20261022133907_ReviewRemediationIndexes'
+)
+BEGIN
+    CREATE INDEX [IX_AuditLogEntries_EntityType_Timestamp] ON [AuditLogEntries] ([EntityType], [Timestamp] DESC);
+END;
+
+IF NOT EXISTS (
+    SELECT * FROM [__EFMigrationsHistory]
+    WHERE [MigrationId] = N'20261022133907_ReviewRemediationIndexes'
+)
+BEGIN
+    CREATE INDEX [IX_AuditLogEntries_Timestamp_Id] ON [AuditLogEntries] ([Timestamp] DESC, [Id] DESC);
+END;
+
+IF NOT EXISTS (
+    SELECT * FROM [__EFMigrationsHistory]
+    WHERE [MigrationId] = N'20261022133907_ReviewRemediationIndexes'
+)
+BEGIN
+    CREATE INDEX [IX_AuditLogEntries_User_Timestamp] ON [AuditLogEntries] ([User], [Timestamp] DESC);
+END;
+
+IF NOT EXISTS (
+    SELECT * FROM [__EFMigrationsHistory]
+    WHERE [MigrationId] = N'20261022133907_ReviewRemediationIndexes'
+)
+BEGIN
+
+    CREATE NONCLUSTERED INDEX IX_AuditLog_Kind_Occurred
+    ON dbo.AuditLog (Kind, OccurredAtUtc DESC)
+    ON ps_AuditLog_Month(OccurredAtUtc);
+END;
+
+IF NOT EXISTS (
+    SELECT * FROM [__EFMigrationsHistory]
+    WHERE [MigrationId] = N'20261022133907_ReviewRemediationIndexes'
+)
+BEGIN
+
+    CREATE NONCLUSTERED INDEX IX_AuditLog_Actor_Occurred
+    ON dbo.AuditLog (Actor, OccurredAtUtc DESC)
+    ON ps_AuditLog_Month(OccurredAtUtc);
+END;
+
+IF NOT EXISTS (
+    SELECT * FROM [__EFMigrationsHistory]
+    WHERE [MigrationId] = N'20261022133907_ReviewRemediationIndexes'
+)
+BEGIN
+    INSERT INTO [__EFMigrationsHistory] ([MigrationId], [ProductVersion])
+    VALUES (N'20261022133907_ReviewRemediationIndexes', N'10.0.7');
+END;
+
+COMMIT;
+GO
+