**Task Overview:**
As a senior data analyst, your task is to enhance an initial database schema to provide a more detailed and realistic structure based on a given business scenario.

**Steps:**
1. **Analyze the Scenario:** Understand the provided business context.
2. **Identify Enhancements:** For each existing table, suggest new columns and explain their relevance. Be creative and thorough.
3. **Enrich the Schema:** Present the enriched schema in JSON format, ensuring proper primary and foreign key relationships.

**Business Domain:**
{domain}

**Business Scenario:**
{scenario}

**Initial Database Schema:**
```json
{schema}
```

**Output Format:**
Your output should provide the enriched database schema in JSON format:
```json
    -- enriched database schema
```

Let's think step by step.