fix(lib): eliminate remaining lib compiler warnings

- Fix snprintf truncation in MySQL_Monitor ConsumerThread (%.15s for 16-byte buffer)
- Mark unused safe_update_peer_info in ProxySQL_Cluster with __attribute__((unused))
- Remove unused start_time in GenAI_Thread::generate_embeddings
- Remove unused now_iso() in Discovery_Schema

lib/Discovery_Schema.cpp

@@ -13,15 +13,6 @@
 
 using json = nlohmann::json;
 
-// Helper function for current timestamp
-static std::string now_iso() {
-	char buf[64];
-	time_t now = time(NULL);
-	struct tm* tm_info = gmtime(&now);
-	strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%SZ", tm_info);
-	return std::string(buf);
-}
-
 Discovery_Schema::Discovery_Schema(const std::string& path)
 	: db(NULL), db_path(path), mcp_rules_version(0)
 {

lib/GenAI_Thread.cpp

@@ -973,8 +973,6 @@ GenAI_EmbeddingResult GenAI_Threads_Handler::call_llama_batch_embedding(const st
 	headers = curl_slist_append(headers, "Content-Type: application/json");
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
 
-	// Perform request
-	auto start_time = std::chrono::steady_clock::now();
 	CURLcode res = curl_easy_perform(curl);
 
 	if (res != CURLE_OK) {

lib/MySQL_Monitor.cpp

@@ -109,7 +109,7 @@ class ConsumerThread : public Thread {
 	ConsumerThread(wqueue<WorkItem<T>*>& queue, int _n, const char *thread_name=NULL) : m_queue(queue) {
 		thrn=_n;
 		if (thread_name && thread_name[0]) {
-			snprintf(thr_name, sizeof(thr_name), "%.16s", thread_name);
+			snprintf(thr_name, sizeof(thr_name), "%.15s", thread_name);
 		} else {
 			snprintf(thr_name, sizeof(thr_name), "%.12s%03d", typeid(T).name(), thrn);
 		}

lib/ProxySQL_Cluster.cpp

@@ -122,7 +122,7 @@ static char *NODE_COMPUTE_DELIMITER=(char *)"-gtyw23a-"; // a random string used
  *
  * @return Returns true if allocation succeeded, false on memory allocation failure
  */
-static bool safe_update_peer_info(char** existing_hostname, char** existing_ip_addr,
+static bool __attribute__((unused)) safe_update_peer_info(char** existing_hostname, char** existing_ip_addr,
                                    const char* new_hostname, const char* new_ip_addr) {
 	// Free existing allocations
 	if (*existing_hostname) {