docs: add comprehensive documentation for today's work

Technical Documentation:
- docs/development/architecture-fixes-2026-01.md: Complete guide to
  all architecture validation fixes (62 -> 0 errors)

User Guides:
- docs/guides/email-templates.md: How-to guide for vendors and admins
  to use the email template customization system

Implementation Docs:
- docs/implementation/password-reset-implementation.md: Technical
  documentation for the password reset feature
- Updated email-templates-architecture.md with EmailTemplateService
  documentation and related links

Bugfix:
- Fixed TemplateListItem Pydantic model to match service output
  (languages vs available_languages field name)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/development/synology-github-repo.md

@@ -56,7 +56,7 @@ Git is an open-source, distributed version control system that helps you manage
 Adding new repository on NAS DS223J
 
    ```bash
-    > ssh boulaht1@DS223J
+    > ssh boulaht1@DS223J -p 22
     > sudo -i
     > cd /volume1/git-repos/
     > git --bare init my-repo.git