rubocop: add rubocop-fluentd and rubocop-performance

Author: Watson1978

.rubocop.yml

@@ -1,3 +1,7 @@
+plugins:
+  - rubocop-performance
+  - rubocop-fluentd
+
 AllCops:
   Exclude:
     - 'lib/opentelemetry/**/*'
@@ -6,6 +10,15 @@ AllCops:
   SuggestExtensions: false
   TargetRubyVersion: 3.2
 
+# rubocop-fluentd
+Lint/FluentdPluginLogScope:
+  Enabled: true
+Lint/FluentdPluginConfigParamDefaultTime:
+  Enabled: true
+Performance/FluentdPluginLogStringInterpolation:
+  Enabled: true
+
+# rubocop
 Gemspec/DevelopmentDependencies:
   Enabled: false
 

Gemfile

@@ -9,6 +9,9 @@ gem "grpc", "~> 1.73"
 gem "grpc-tools"
 gem "irb"
 gem "rake", "~> 13.0"
-gem "rubocop", "~> 1.75"
 gem "test-unit", "~> 3.0"
 gem "timecop"
+
+gem "rubocop", "~> 1.75"
+gem "rubocop-fluentd", "~> 0.2"
+gem "rubocop-performance", "~> 1.25"