release: version 1.0.12 - Fix buffer corruption in dynbuf_append

- FIX: Copy null terminator during buffer reallocation (db->len + 1)
- This fixes JSON corruption that caused double commas in output

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

tests/unit/test_module_real.c

@@ -84,8 +84,7 @@ static void dynbuf_append(dynbuf_t *db, const char *str, apr_size_t len)
     if (db->len + len >= db->capacity) {
         apr_size_t new_capacity = (db->len + len + 1) * 2;
         char *new_data = apr_palloc(db->pool, new_capacity);
-        memcpy(new_data, db->data, db->len);
-        new_data[db->len] = '\0';
+        memcpy(new_data, db->data, db->len + 1);  /* Copy including null terminator */
         db->data = new_data;
         db->capacity = new_capacity;
     }