ErrorMessage class: add notice for non error logging to log file

info is already used for write back to front. So we use notice for
non error level messages into the log file

4dev/tests/Logging/CoreLibsLoggingErrorMessagesTest.php

@@ -44,6 +44,11 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 				'str' => 'INFO',
 				'expected' => 'info',
 			],
+			'notice' => [
+				'level' => 'notice',
+				'str' => 'NOTICE',
+				'expected' => 'notice',
+			],
 			'warn' => [
 				'level' => 'warn',
 				'str' => 'WARN',
@@ -238,6 +243,22 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 				'log_error' => true,
 				'expected' => '<ERROR> OTHER ERROR MESSAGE',
 			],
+			'notice' => [
+				'id' => '100',
+				'level' => 'notice',
+				'str' => 'NOTICE MESSAGE',
+				'message' => null,
+				'log_error' => null,
+				'expected' => '<NOTICE> NOTICE MESSAGE',
+			],
+			'notice, message' => [
+				'id' => '100',
+				'level' => 'notice',
+				'str' => 'NOTICE MESSAGE',
+				'message' => 'OTHER NOTICE MESSAGE',
+				'log_error' => null,
+				'expected' => '<NOTICE> OTHER NOTICE MESSAGE',
+			],
 			'crash' => [
 				'id' => '300',
 				'level' => 'crash',

www/lib/CoreLibs/Logging/ErrorMessage.php

@@ -42,6 +42,7 @@ class ErrorMessage
 	 * error_id: internal Error ID (should be unique)
 	 * level: error level, can only be ok, info, warn, error, abort, crash
 	 *        ok and info are positive response: success
+	 *        notice: a debug message for information only
 	 *        warn: success, but there might be some things that are not 100% ok
 	 *        error: input error or error in executing request
 	 *        abort: an internal error happened as mandatory information that normally is
@@ -98,6 +99,12 @@ class ErrorMessage
 		];
 		// write to log for abort/crash
 		switch ($level) {
+			case 'notice':
+				$this->log->notice($message ?? $str, array_merge([
+					'id' => $error_id,
+					'level' => $original_level,
+				], $context));
+				break;
 			case 'error':
 				if ($log_error) {
 					$this->log->error($message ?? $str, array_merge([

www/lib/CoreLibs/Logging/Logger/MessageLevel.php

@@ -15,6 +15,7 @@ enum MessageLevel: int
 {
 	case ok = 100;
 	case info = 200;
+	case notice = 250;
 	case warn = 300;
 	case error = 400;
 	case abort = 500;
@@ -30,6 +31,7 @@ enum MessageLevel: int
 		return match (strtolower($name)) {
 			'ok' => self::ok,
 			'info' => self::info,
+			'notice' => self::notice,
 			'warn', 'warning' => self::warn,
 			'error' => self::error,
 			'abort' => self::abort,