Add and track events for Vulnerability auto-resolution

Changelog: added
EE: true

ee/app/services/vulnerabilities/auto_resolve_service.rb

@@ -3,6 +3,7 @@
 module Vulnerabilities
   class AutoResolveService
     include Gitlab::Utils::StrongMemoize
+    include Gitlab::InternalEventsTracking
 
     def initialize(project, vulnerability_ids, budget)
       @project = project
@@ -73,10 +74,19 @@ def resolve_vulnerabilities
           updated_at: now
         )
       end
+
       Note.transaction do
         results = Note.insert_all!(system_note_attrs, returning: %w[id])
         SystemNoteMetadata.insert_all!(note_metadata_attrs(results))
       end
+
+      track_internal_event(
+        'autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set',
+        project: project,
+        additional_properties: {
+          value: vulnerabilities_to_resolve.size
+        }
+      )
     end
 
     def state_transition_attrs

ee/config/events/autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set.yml

+---
+description: Vulnerabilities being auto-resolved in a Project when auto-resolve policy is set
+internal_events: true
+action: autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set
+identifiers:
+- project
+- namespace
+additional_properties:
+  value:
+    description: Count of auto-resolved Vulnerabilities
+product_group: security_insights
+product_categories:
+- vulnerability_management
+milestone: '17.7'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/175012
+tiers:
+- premium
+- ultimate

ee/config/metrics/counts_all/count_distinct_project_id_from_vulnerability_auto_resolution.yml

+---
+key_path: redis_hll_counters.count_distinct_project_id_from_vulnerability_auto_resolution
+description: Count of unique projects where auto-resolution of Vulnerabilities is being used
+product_group: security_insights
+product_categories:
+- vulnerability_management
+performance_indicator_type: []
+value_type: number
+status: active
+milestone: '17.7'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/175012
+time_frame:
+- 7d
+- 28d
+- all
+data_source: internal_events
+data_category: optional
+distribution:
+- ee
+tiers:
+- premium
+- ultimate
+events:
+- name: autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set
+  unique: project.id

ee/config/metrics/counts_all/count_total_autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set.yml

+---
+key_path: sums.count_total_autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set
+description: Total count of auto-resolved Vulnerabilities in projects with auto-resolution policy set
+product_group: security_insights
+product_categories:
+- vulnerability_management
+performance_indicator_type: []
+value_type: number
+status: active
+milestone: '17.7'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/175012
+time_frame:
+- 7d
+- 28d
+- all
+data_source: internal_events
+data_category: optional
+distribution:
+- ee
+tiers:
+- premium
+- ultimate
+events:
+- name: autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set
+  operator: sum(value)

ee/spec/services/vulnerabilities/auto_resolve_service_spec.rb

@@ -157,6 +157,51 @@
       let_it_be(:vulnerabilities) { create_list(:vulnerability, 2, :with_findings, project: project) }
       let_it_be(:vulnerability_ids) { vulnerabilities.map(&:id) }
 
+      describe 'internal event tracking' do
+        let(:event) { 'autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set' }
+        let(:distinct_count_weekly) do
+          'redis_hll_counters.count_distinct_project_id_from_vulnerability_auto_resolution_weekly'
+        end
+
+        let(:distinct_count_monthly) do
+          'redis_hll_counters.count_distinct_project_id_from_vulnerability_auto_resolution_monthly'
+        end
+
+        let(:distinct_count_total) { 'redis_hll_counters.count_distinct_project_id_from_vulnerability_auto_resolution' }
+        let(:total_count_weekly) do
+          'sums.count_total_autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set_weekly'
+        end
+
+        let(:total_count_monthly) do
+          'sums.count_total_autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set_monthly'
+        end
+
+        let(:total_count) do
+          'sums.count_total_autoresolve_vulnerability_in_project_after_pipeline_run_if_policy_is_set'
+        end
+
+        let(:additional_properties) do
+          {
+            value: vulnerabilities.size
+          }
+        end
+
+        it 'tracks internal events', :clean_gitlab_redis_shared_state, :aggregate_failures do
+          expect { service.execute }
+            .to trigger_internal_events(event)
+            .with(
+              project: project,
+              namespace: project.namespace,
+              additional_properties: additional_properties
+            ).and increment_usage_metrics(distinct_count_weekly).by(1)
+              .and increment_usage_metrics(distinct_count_monthly).by(1)
+              .and increment_usage_metrics(distinct_count_total).by(1)
+              .and increment_usage_metrics(total_count_weekly).by(2)
+              .and increment_usage_metrics(total_count_monthly).by(2)
+              .and increment_usage_metrics(total_count).by(2)
+        end
+      end
+
       it 'does not introduce N+1 queries' do
         control = ActiveRecord::QueryRecorder.new do
           described_class.new(project, vulnerability_ids, budget).execute