Index moderation case references for database integrity checks

src/lib/server/db/migrations.ts

@@ -34,7 +34,8 @@ import {
     migrateModerationCaseActions,
     migrateModerationCaseAssessments,
     migrateModerationCaseRelationships,
-    migrateModerationCaseFollowups
+    migrateModerationCaseFollowups,
+    migrateModerationCaseReferenceIndexes
 } from '../moderation/schema.js';
 import type { Migration } from './migration-runner.js';
 
@@ -197,6 +198,11 @@ export const migrations: readonly Migration[] = [
         version: 34,
         name: 'moderation follow-up dates and personal updates',
         run: migrateModerationCaseFollowups
+    },
+    {
+        version: 35,
+        name: 'moderation case foreign key reference indexes',
+        run: migrateModerationCaseReferenceIndexes
     }
 ];
 

src/lib/server/moderation/schema.ts

@@ -223,3 +223,15 @@ export function migrateModerationCaseFollowups(handle: Database.Database): void
         CREATE INDEX IF NOT EXISTS moderation_case_notifications_case ON moderation_case_notifications(user_id,case_id,read_at,id DESC);
     `);
 }
+
+/** Foreign-key lookups must cover removed relationships and every notification recipient. */
+export function migrateModerationCaseReferenceIndexes(handle: Database.Database): void {
+    handle.exec(`
+        CREATE INDEX IF NOT EXISTS moderation_case_review_sanction
+            ON moderation_cases(review_sanction_id);
+        CREATE INDEX IF NOT EXISTS moderation_case_relationship_source
+            ON moderation_case_relationships(case_id,removed_at);
+        CREATE INDEX IF NOT EXISTS moderation_case_notifications_parent
+            ON moderation_case_notifications(case_id);
+    `);
+}