Refactor project structure and enhance Docker support

- Removed unnecessary `__init__.py` and `Dockerfile` to streamline project organization.
- Updated `.dockerignore` and `.gitignore` to improve exclusion patterns for build artifacts and environment files.
- Enhanced `Makefile` with new commands for managing Docker containers and added help documentation.
- Introduced `pyproject.toml` for better project metadata management and dependency tracking.
- Updated `requirements.txt` to reflect changes in dependencies for metrics and monitoring.
- Refactored various handler files to improve code organization and maintainability.

helper_bot/handlers/private/private_handlers.py

@@ -24,6 +24,14 @@ from helper_bot.utils.helper_func import (
     check_user_emoji
 )
 
+# Local imports - metrics
+from helper_bot.utils.metrics import (
+    metrics, 
+    track_time, 
+    track_errors, 
+    db_query_time
+)
+
 # Local imports - modular components
 from .constants import FSM_STATES, BUTTON_TEXTS, ERROR_MESSAGES
 from .services import BotSettings, UserService, PostService, StickerService
@@ -91,16 +99,23 @@ class PrivateHandlers:
         await message.answer('Я перезапущен!', reply_markup=markup, parse_mode='HTML')
     
     @error_handler
+    @track_time("start_message_handler", "private_handler")
+    @track_errors("private_handler", "start_message_handler")
     async def handle_start_message(self, message: types.Message, state: FSMContext, **kwargs):
-        """Handle start command and return to bot button"""
+        """Handle start command and return to bot button with metrics tracking"""
+        # Record start command metrics
+        metrics.record_command("start", "private_handler", "user" if not message.from_user.is_bot else "bot")
+        metrics.record_message("command", "private", "private_handler")
+        
+        # User service operations with metrics
         await self.user_service.log_user_message(message)
         await self.user_service.ensure_user_exists(message)
         await state.set_state(FSM_STATES["START"])
         
-        # Send sticker
+        # Send sticker with metrics
         await self.sticker_service.send_random_hello_sticker(message)
         
-        # Send welcome message
+        # Send welcome message with metrics
         markup = get_reply_keyboard(self.db, message.from_user.id)
         hello_message = messages.get_message(get_first_name(message), 'HELLO_MESSAGE')
         await message.answer(hello_message, reply_markup=markup, parse_mode='HTML')