fix: use -O3 for more warnings

fix. strncat warning

src/models/junction_relay_schedule.c

@@ -40,7 +40,7 @@ junction_relay_schedule_insert_weekdays(int relay_id, int *schedule_ids)
     static const char query_base[] = "INSERT INTO junction_relay_schedule (weekday, schedule_id, relay_id) VALUES";
     static const char query_extender[] = " (?, ?, ?)";
 
-    size_t query_len = STRLEN(query_base) + (7 * (STRLEN(query_extender) + 1));
+    size_t query_len = STRLEN(query_base) + (7 * (STRLEN(query_extender) + 1)) + 1;
     char *query = malloc(sizeof(char) * query_len + 1);
     strncpy(query, query_base, query_len);
     query_len -= STRLEN(query_base);

src/models/junction_tag.c

@@ -67,7 +67,7 @@ junction_tag_insert_list(int *tag_ids, int relay_id, int schedule_id, int count)
     static const char query_base[] = "INSERT INTO junction_tag(tag_id, schedule_id, relay_id) VALUES";
     static const char query_extender[] = " (?, ?, ?)";
 
-    size_t query_len = STRLEN(query_base) + (count * (STRLEN(query_extender) + 1));
+    size_t query_len = STRLEN(query_base) + (count * (STRLEN(query_extender) + 1)) + 1;
     char *query = malloc(sizeof(char) * query_len + 1);
     strncpy(query, query_base, query_len);
     query_len -= STRLEN(query_base);