enhance: stats apiの重い処理をスキップできるように

[kakkokari-gtyih]

What

リアクションカウントのぶぶんをスキップして/stats APIを返せるようにした

Why

#4880 (comment)
（根本解決ではないが、暫定対応としてはこれで十分かと）

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[github-actions]

このPRによるapi.jsonの差分

差分はこちら

--- base
+++ head
@@ -401,6 +401,9 @@
                     "enableServerMachineStats": {
                       "type": "boolean"
                     },
+                    "enableEnhancedServerStats": {
+                      "type": "boolean"
+                    },
                     "enableIdenticonGeneration": {
                       "type": "boolean"
                     },
@@ -654,6 +657,7 @@
                     "enableChartsForFederatedInstances",
                     "enableStatsForFederatedInstances",
                     "enableServerMachineStats",
+                    "enableEnhancedServerStats",
                     "enableIdenticonGeneration",
                     "manifestJsonOverride",
                     "policies",
@@ -14288,6 +14292,9 @@
                   "enableServerMachineStats": {
                     "type": "boolean"
                   },
+                  "enableEnhancedServerStats": {
+                    "type": "boolean"
+                  },
                   "enableIdenticonGeneration": {
                     "type": "boolean"
                   },

Get diff files from Workflow Page

[codecov]

Codecov Report

Attention: Patch coverage is 30.55556% with 25 lines in your changes missing coverage. Please review.

Project coverage is 39.96%. Comparing base (a77ad7a) to head (43ac9fc).
Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/frontend/src/pages/admin/performance.vue	0.00%	16 Missing ⚠️
...kend/src/server/api/endpoints/admin/update-meta.ts	20.00%	4 Missing ⚠️
packages/backend/src/server/api/endpoints/stats.ts	20.00%	4 Missing ⚠️
...ges/backend/src/server/api/endpoints/admin/meta.ts	80.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #15062      +/-   ##
===========================================
- Coverage    39.96%   39.96%   -0.01%     
===========================================
  Files         1563     1563              
  Lines       197744   197778      +34     
  Branches      3631     3632       +1     
===========================================
+ Hits         79027    79034       +7     
- Misses      118112   118139      +27     
  Partials       605      605              

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