fix(logging): correct log level severity order

Reverse enum so lower values = less severe, higher = more severe.
This makes the filter check (level < min_log_level) work correctly.

- DEBUG (0) - least severe, filtered by default
- INFO (1) - default minimum level
- WARN (2) - warnings and above
- ERROR (3) - most severe, always shown

Fixes incorrect filtering where ERROR/WARN were being blocked.

include/stk_log.h

@@ -8,10 +8,10 @@ extern "C" {
 #endif
 
 typedef enum {
-	STK_LOG_ERROR,
-	STK_LOG_WARN,
+	STK_LOG_DEBUG,
 	STK_LOG_INFO,
-	STK_LOG_DEBUG
+	STK_LOG_WARN,
+	STK_LOG_ERROR
 } stk_log_level_t;
 
 void stk_set_log_output(FILE *fp);