fix(platform): fix 2 type errors found in typecheck sweep

- api-key-auth.ts: Record<string, unknown> → FilterMap (import from @bytelyst/datastore)
- reviews/notifications.ts: raw subject/html/text → templateId + variables (match dispatchEmail signature)

services/platform-service/src/lib/api-key-auth.ts

@@ -1,6 +1,7 @@
 import crypto from 'node:crypto';
 import bcrypt from 'bcryptjs';
 import type { FastifyInstance, FastifyRequest } from 'fastify';
+import type { FilterMap } from '@bytelyst/datastore';
 import { ForbiddenError, TooManyRequestsError, UnauthorizedError } from './errors.js';
 import { getCollection } from './datastore.js';
 import * as rateLimitStore from '../modules/ratelimit/store.js';
@@ -339,7 +340,7 @@ export async function registerOptionalApiKeyContext(app: FastifyInstance): Promi
     if (!rawKey) return;
 
     const prefix = rawKey.slice(0, 12);
-    const filter: Record<string, unknown> = {
+    const filter: FilterMap = {
       prefix,
       status: 'active',
       expiresAt: { $gte: new Date().toISOString() },

services/platform-service/src/modules/reviews/notifications.ts

@@ -21,14 +21,12 @@ export async function notifyReviewAssigned(
   await dispatchEmail(
     {
       to,
-      subject: `Review assigned: ${review.title}`,
-      html: [
-        `<p>A review item has been assigned to you.</p>`,
-        `<p><strong>${review.title}</strong></p>`,
-        `<p>${review.description}</p>`,
-        review.runId ? `<p>Run ID: ${review.runId}</p>` : '',
-      ].join(''),
-      text: `Review assigned: ${review.title}\n\n${review.description}${review.runId ? `\n\nRun ID: ${review.runId}` : ''}`,
+      templateId: 'review-assigned',
+      variables: {
+        title: review.title,
+        description: review.description ?? '',
+        runId: review.runId ?? '',
+      },
       productId: review.productId,
       userId: review.assignedTo,
     },