Implement Llama-based brewery and user data generation; remove mock generator and related files

pipeline/includes/llama_generator.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "data_generator.h"
+#include <memory>
+#include <string>
+
+struct llama_model;
+struct llama_context;
+
+class LlamaGenerator final : public IDataGenerator {
+public:
+  ~LlamaGenerator() override;
+
+  void load(const std::string &modelPath) override;
+  BreweryResult generateBrewery(const std::string &cityName,
+                                const std::string &regionContext) override;
+  UserResult generateUser(const std::string &locale) override;
+
+private:
+  std::string infer(const std::string &prompt, int maxTokens = 256);
+
+  llama_model *model_ = nullptr;
+  llama_context *context_ = nullptr;
+};