fix: Sécuriser l’écriture socket et initialiser APR dans les tests

Co-authored-by: aider (openrouter/openai/gpt-5.3-codex) <aider@aider.chat>

tests/unit/test_json_serialization.c

@@ -12,6 +12,7 @@
 #include <apr_strings.h>
 #include <apr_time.h>
 #include <apr_lib.h>
+#include <apr_general.h>
 
 typedef struct {
     char *data;
@@ -235,6 +236,19 @@ static void test_json_escape_user_agent(void **state)
     apr_pool_destroy(pool);
 }
 
+static int group_setup(void **state)
+{
+    (void)state;
+    return apr_initialize();
+}
+
+static int group_teardown(void **state)
+{
+    (void)state;
+    apr_terminate();
+    return 0;
+}
+
 int main(void)
 {
     const struct CMUnitTest tests[] = {
@@ -248,5 +262,5 @@ int main(void)
         cmocka_unit_test(test_json_escape_user_agent),
     };
 
-    return cmocka_run_group_tests(tests, NULL, NULL);
+    return cmocka_run_group_tests(tests, group_setup, group_teardown);
 }