Create new tenant-specific validation rules for claim processing.

**Use Case:** Define custom business rules for your hospital's claim validation requirements.

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

**Request Structure:**
List of rule objects to create.

**Rule Components:**
- requirement: What the rule checks (description)
- applicability: Logic defining when rule applies
  - age_min/age_max: Patient age range
  - sex: allowed gender (M/F/any)
  - care_type: List of care types (e.g. ["Rawat Inap"])
- severity: ERROR | WARNING | INFO
  - ERROR: Blocks claim submission
  - WARNING: Shows warning but allows submission
  - INFO: Informational message only
- category: Rule category (e.g., "Administratif")

**Example Request:**
```json
{
    "rules": [
        {
            "requirement": "Patient age must be between 0 and 150 years",
            "applicability": {
                "age_min": 0,
                "age_max": 150,
                "sex": "any",
                "care_type": ["Rawat Inap", "Rawat Jalan"]
            },
            "severity": "ERROR",
            "category": "Administratif"
        }
    ]
}
```

**Example Response:**
```json
{
    "created_rules": [
        {
            "rule_id": "rule-uuid-123",
            "requirement": "Patient age must be between 0 and 150 years",
            "status": "ACTIVE"
        }
    ]
}
```

**Common Errors:**
- 400: Invalid condition syntax
- 403: Insufficient permissions
- 500: Validator Service error