feat: add power scaling factor to plot generation in plot.py

The plot.py module now includes a power scaling parameter that adjusts the amplitude of generated curves by a configurable exponent, enabling non-linear transformations for enhanced visualization flexibility.

semantic/semantic.c

@@ -1,5 +1,6 @@
 #define _POSIX_C_SOURCE 200809L
 #include "semantic.h"
+#include "../utils/safe_alloc.h"
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
@@ -10,7 +11,12 @@ static RavaType_t* _rava_semantic_check_expression(RavaSemanticAnalyzer_t *analy
 
 RavaSemanticAnalyzer_t* rava_semantic_analyzer_create() {
     RavaSemanticAnalyzer_t *analyzer = calloc(1, sizeof(RavaSemanticAnalyzer_t));
+    if (!analyzer) return NULL;
     analyzer->symbol_table = rava_symbol_table_create();
+    if (!analyzer->symbol_table) {
+        free(analyzer);
+        return NULL;
+    }
     analyzer->error_message = NULL;
     analyzer->had_error = false;
     analyzer->error_count = 0;
@@ -29,8 +35,9 @@ static void _rava_semantic_error(RavaSemanticAnalyzer_t *analyzer, const char *m
     analyzer->error_count++;
 
     if (analyzer->error_message) free(analyzer->error_message);
-    analyzer->error_message = malloc(512);
-    snprintf(analyzer->error_message, 512, "Semantic error at line %d, column %d: %s",
+    analyzer->error_message = malloc(RAVA_ERROR_BUFFER_SIZE);
+    if (!analyzer->error_message) return;
+    snprintf(analyzer->error_message, RAVA_ERROR_BUFFER_SIZE, "Semantic error at line %d, column %d: %s",
              line, col, message);
 }