rename Metric Classes and change Folder Structure

tests/test_MetricsManager.py

@@ -1,11 +1,14 @@
 import unittest
 from typing import Any, cast
 
-from server.metrics.MetricsManager import MetricsManager
+from server.metrics import (
+  MetricsStoreBuilder,
+  MemoryMetricsStore,
+)
 
-class TestMetricsManager(unittest.IsolatedAsyncioTestCase):
+class TestMetricsStoreTemplate(unittest.IsolatedAsyncioTestCase):
   async def test_memory_backend_returns_local_snapshot(self):
-    manager = MetricsManager(backend="memory")
+    manager = MetricsStoreBuilder.build(backend="memory")
     local = {
       "games_started": 2,
       "games_ended": 1,
@@ -49,7 +52,7 @@ class TestMetricsManager(unittest.IsolatedAsyncioTestCase):
     await manager.close()
 
   async def test_merge_snapshots_aggregates_totals(self):
-    manager = MetricsManager(backend="memory")
+    manager = MemoryMetricsStore()
     merged = manager._merge_snapshots(
       [
         {
@@ -152,7 +155,7 @@ class TestMetricsManager(unittest.IsolatedAsyncioTestCase):
       async def close(self):
         return None
 
-    manager = MetricsManager(backend="redis", key_prefix="snake:metrics:worker")
+    manager = MetricsStoreBuilder.build(backend="redis", key_prefix="snake:metrics:worker")
     fake_store = FakeStore()
     manager.store = cast(Any, fake_store)