Refactor metrics handling and remove scheduler

- Removed the metrics scheduler functionality from the bot, transitioning to real-time metrics updates via middleware.
- Enhanced logging for metrics operations across various handlers to improve monitoring and debugging capabilities.
- Integrated metrics tracking for user activities and database errors, providing better insights into bot performance.
- Cleaned up code by removing obsolete comments and unused imports, improving overall readability and maintainability.

helper_bot/utils/metrics.py

@@ -70,6 +70,14 @@ class BotMetrics:
             registry=self.registry
         )
         
+        # Database errors counter
+        self.db_errors_total = Counter(
+            'db_errors_total',
+            'Total number of database errors',
+            ['error_type', 'query_type', 'table_name', 'operation'],
+            registry=self.registry
+        )
+        
         # Message processing metrics
         self.messages_processed_total = Counter(
             'messages_processed_total',
@@ -92,7 +100,14 @@ class BotMetrics:
         self.rate_limit_hits_total = Counter(
             'rate_limit_hits_total',
             'Total number of rate limit hits',
-            ['limit_type', 'handler_type'],
+            ['limit_type', 'user_id', 'action'],
+            registry=self.registry
+        )
+        # User activity metrics
+        self.user_activity_total = Counter(
+            'user_activity_total',
+            'Total user activity events',
+            ['activity_type', 'user_type', 'chat_type'],
             registry=self.registry
         )
     
@@ -121,8 +136,8 @@ class BotMetrics:
             status=status
         ).observe(duration)
     
-    def set_active_users(self, count: int, user_type: str = "total"):
-        """Set the number of active users."""
+    def set_active_users(self, count: int, user_type: str = "daily"):
+        """Set the number of active users for a specific type."""
         self.active_users.labels(user_type=user_type).set(count)
     
     def record_db_query(self, query_type: str, duration: float, table_name: str = "unknown", operation: str = "unknown"):
@@ -275,6 +290,12 @@ def db_query_time(query_type: str = "unknown", table_name: str = "unknown", oper
             except Exception as e:
                 duration = time.time() - start_time
                 metrics.record_db_query(query_type, duration, table_name, operation)
+                metrics.record_db_error(
+                    type(e).__name__,
+                    query_type,
+                    table_name,
+                    operation
+                )
                 metrics.record_error(
                     type(e).__name__,
                     "database",
@@ -293,6 +314,12 @@ def db_query_time(query_type: str = "unknown", table_name: str = "unknown", oper
             except Exception as e:
                 duration = time.time() - start_time
                 metrics.record_db_query(query_type, duration, table_name, operation)
+                metrics.record_db_error(
+                    type(e).__name__,
+                    query_type,
+                    table_name,
+                    operation
+                )
                 metrics.record_error(
                     type(e).__name__,
                     "database",