fix(watchdog): fix watchdog unable to send webhook and simplify the parsing of json config

- Change webhook config headers and body from map to string format
- Move command parsing logic to separate function in command.go
- Add debug logging for webhook operations
- Improve exception handling with proper JSON parsing
- Simplify config loading logic with default values

webhook/webhook.go

@@ -14,6 +14,7 @@ import (
 // If the status code is not 200, it logs the error and returns the status code and response message.
 // If the status code is 200, it returns an empty error message, status code, and response message.
 func SendHook(url string, method string, headers map[string]string, body string) (err string, code int, msg string) {
+	postLog.Debug(fmt.Sprintf("[SendHook] SendHook { %s, %s, %s, %s }", url, method, headers, body))
 	req, reqErr := http.NewRequest(method, url, strings.NewReader(body))
 	if reqErr != nil {
 		return reqErr.Error(), 500, ""
@@ -34,6 +35,8 @@ func SendHook(url string, method string, headers map[string]string, body string)
 	if resp.StatusCode != http.StatusOK {
 		postLog.Debug(fmt.Sprintf("[SendHook] SendHook { %s, %s, %s, %s } failed, status code: %d, response: [%s]: %s", url, method, headers, body, resp.StatusCode, resp.Status, respMsg))
 		return fmt.Sprintf("unexpected status code: %d, response: [%s]: %s", resp.StatusCode, resp.Status, respMsg), resp.StatusCode, respMsg
+	} else {
+		postLog.Debug(fmt.Sprintf("[SendHook] SendHook { %s, %s, %s, %s } success, status code: %d, response: [%s]: %s", url, method, headers, body, resp.StatusCode, resp.Status, respMsg))
 	}
 	return "", 200, ""
 }