Add model-redis package references to documentation

- Added ORM reference in architecture.md (Redis section)
- Added Data Models section in contributing.md with example
- Updated README.md to mention model-redis in Architecture
- Linked to https://www.npmjs.com/package/model-redis for more info

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

docs/architecture.md

@@ -105,6 +105,8 @@ nodejs/
 
 ### Redis (Data Store)
 
+**ORM:** [model-redis](https://www.npmjs.com/package/model-redis) - A lightweight Redis ORM for Node.js with schema validation, relationships, and automatic key management.
+
 **Stored Data:**
 - Host configurations (domain, IP, port, SSL settings)
 - User accounts and hashed passwords