Update daily notes with FRE-4520 security remediation status

- Document all 4 Medium and 2 Low severity fixes
- Note that issue is now in_review for Code Reviewer

Co-Authored-By: Paperclip <noreply@paperclip.ing>

memory/2026-05-01.md

@@ -67,3 +67,41 @@ Issue FRE-4499 moved to `in_review` for Code Reviewer.
 2. Add integration tests
 3. Performance validation (<200ms latency)
 4. Rule management API endpoints
+
+## FRE-4520: Notification Template System with Localization
+
+### Security Remediation Complete
+
+All 4 Medium and 2 Low severity findings from security review have been addressed:
+
+#### Medium Severity (Fixed)
+1. **HTML Injection** - Added `escapeHtml()` method with proper entity encoding in `template.service.ts`
+2. **Rate Limit Bug** - Fixed count/timestamp confusion by using `RateLimitEntry` interface in `email.service.ts`
+3. **Open Redirect** - Added URL validation against trusted domains in `template.service.ts`
+4. **Dedup Expiration** - Added TTL-based expiration to in-memory deduplication in `notification.service.ts`
+
+#### Low Severity (Fixed)
+5. **Zod Validation** - Now using `NotificationConfigSchema.parse()` in `notification.config.ts`
+6. **Email Validation** - Added `EMAIL_PATTERN` regex validation in `email.service.ts`
+
+### Test Results
+- All 29 tests passing ✅
+- Commit: c490735
+
+### Status
+Issue updated to `in_review` and assigned to Code Reviewer (commit c490735).
+
+## FRE-4518: Replace hardcoded default score values with constants
+
+### Approval
+- Final approval granted by Founding Engineer
+- Behavioral score constants properly implemented:
+  - SHORT_CALL_SCORE
+  - SHORT_SMS_SCORE
+  - SHORT_CONTENT_SCORE
+  - URGENT_KEYWORD_SCORE
+- All acceptance criteria verified:
+  1. ✅ Extracted default scores to constants
+  2. ✅ Used constants throughout codebase
+  3. ✅ Documented constant values and purpose
+- Issue marked as `done`