Activate or deactivate validation rules.

**Use Case:** Temporarily disable rules during testing or enable rules after validation.

**Authentication:** API Key (X-API-Key header)
**Required Scope:** `rules:write`

**Request Structure:**
- scope: "tenant"
- activate_rules: List of {rule_id} to activate
- deactivate_rules: List of {rule_id} to deactivate

**Status Values:**
- ACTIVE: Rule is enforced on claim submissions
- INACTIVE: Rule is ignored (not enforced)

**Example Request:**
```json
{
    "scope": "tenant",
    "activate_rules": [
        {"rule_id": "rule-uuid-123"}
    ],
    "deactivate_rules": [
        {"rule_id": "rule-uuid-456"}
    ]
}
```

**Example Response:**
```json
{
    "activated_ids": ["rule-uuid-123"],
    "deactivated_ids": ["rule-uuid-456"]
}
```