fix: llama backend lifetime, Wikipedia enrichment depth, and misc cleanup

pipeline/src/web_client/curl_web_client_utils.cpp

@@ -0,0 +1,28 @@
+/**
+ * @file web_client/curl_web_client_utils.cpp
+ * @brief Shared CURLWebClient helper implementations.
+ */
+
+#include "curl_web_client_utils.h"
+
+#include <stdexcept>
+
+auto create_handle() -> CurlHandle {
+   CURL* handle = curl_easy_init();
+   if (handle == nullptr) {
+      throw std::runtime_error(
+          "[CURLWebClient] Failed to initialize libcurl handle");
+   }
+   return CurlHandle(handle, &curl_easy_cleanup);
+}
+
+auto set_common_get_options(CURL* curl, const std::string& url,
+                            CurlTimeouts timeouts) -> void {
+   curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+   curl_easy_setopt(curl, CURLOPT_USERAGENT, "biergarten-pipeline/0.1.0");
+   curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+   curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 5L);
+   curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeouts.connect_timeout);
+   curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeouts.total_timeout);
+   curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "gzip");
+}