move DD log correlation patch for Active Job to wrap full execution

The current Active Job integration injects a log correlation tag into the logger via `around_perform`, which is too late to pick up the following logs:

```
[ActiveJob] [FooJob] [540c4718-6668-4f3c-9411-ca52a4cffd15] Performing FooJob (Job ID: 540c4718-6668-4f3c-9411-ca52a4cffd15) from Sidekiq(default) enqueued at 2025-09-26T02:17:44.160363327Z with arguments: #<GlobalID:0x00007f0fae88cb50 @uri=#<URI::GID gid://foo-rails/Foo/019983cf-8422-72d5-85b7-f3dc09a4887e>>
[ActiveJob] [FooJob] [540c4718-6668-4f3c-9411-ca52a4cffd15] Performed FooJob (Job ID: 540c4718-6668-4f3c-9411-ca52a4cffd15) from Sidekiq(default) in 990.29ms
```

Instead of using `around_perform`, we now do the same thing that [Active Job itself](https://github.com/rails/rails/blob/v8.0.3/activejob/lib/active_job/logging.rb#L31-L33) does to tag logs with `[ActiveJob]`, the job class name, and job ID, which is wrapping `perform_now`.

Note that this only works on Active Job 6+, so we inject different log correlation logic depending on the Active Job version.

Author: agrobbin

lib/datadog/tracing/contrib/active_job/log_injection.rb

@@ -6,17 +6,31 @@ module Contrib
       module ActiveJob
         # Active Job log injection wrapped around job execution
         module LogInjection
-          def self.included(base)
-            base.class_eval do
-              around_perform do |_, block|
-                if Datadog.configuration.tracing.log_injection && logger.respond_to?(:tagged)
-                  logger.tagged(Tracing.log_correlation, &block)
-                else
-                  block.call
+          # Active Job 4 / 5 don't execute `perform_now` at the right point, so we do best effort log correlation tagging
+          module ActiveJob4
+            def self.included(base)
+              base.class_eval do
+                around_perform do |_, block|
+                  if Datadog.configuration.tracing.log_injection && logger.respond_to?(:tagged)
+                    logger.tagged(Tracing.log_correlation, &block)
+                  else
+                    block.call
+                  end
                 end
               end
             end
           end
+
+          # Active Job 6+ executes `perform_now` at the right point, so we can provide better log correlation tagging
+          module ActiveJob6
+            def perform_now
+              if Datadog.configuration.tracing.log_injection && logger.respond_to?(:tagged)
+                logger.tagged(Tracing.log_correlation) { super }
+              else
+                super
+              end
+            end
+          end
         end
       end
     end

lib/datadog/tracing/contrib/active_job/patcher.rb

@@ -26,7 +26,11 @@ def patch
 
           def inject_log_correlation
             ::ActiveSupport.on_load(:active_job) do
-              include LogInjection
+              if target_version < Gem::Version.new('6.0.0')
+                include LogInjection::ActiveJob4
+              else
+                include LogInjection::ActiveJob6
+              end
             end
           end
         end