Boolean credentials incorrectly classified as "json" in secret .metadata field

[mario-fazli]

Problem

When a service binding contains boolean fields in the credentials (e.g., saasregistryenabled: true), the .metadata field in the generated Kubernetes secret incorrectly classifies these fields as format "json" instead of a more appropriate type like "text" or "boolean".

Example

Service Manager Binding Response:

{
  "credentials": {
    "saasregistryenabled": true,
    "uaa": {...},
    "url": "https://example.com"
  }
}

Generated Secret .metadata field:

{
  "credentialProperties": [
    {"name": "saasregistryenabled", "format": "json"},
    {"name": "uaa", "format": "json"},               
    {"name": "url", "format": "text"}              
  ],
  "metaDataProperties": [...]
}

Root Cause

The issue is in the serialize() function in internal/utils/controller_util.go (lines 151-162). It defaults to JSON for all non-string values:

func serialize(value interface{}) ([]byte, format, error) {
	if byteArrayVal, ok := value.([]byte); ok {
		return byteArrayVal, JSON, nil
	}
	if strVal, ok := value.(string); ok {
		return []byte(strVal), TEXT, nil
	}
	data, err := json.Marshal(value)
	if err != nil {
		return nil, UNKNOWN, err
	}
	return data, JSON, nil 
}