ci: add unit test gate and pushgateway publishing

Jenkinsfile

@@ -43,6 +43,14 @@ spec:
           mountPath: /root/.docker
         - name: harbor-config
           mountPath: /docker-config
+    - name: tester
+      image: golang:1.23-bookworm
+      command:
+        - cat
+      tty: true
+      volumeMounts:
+        - name: workspace-volume
+          mountPath: /home/jenkins/agent
   volumes:
     - name: docker-config-writable
       emptyDir: {}
@@ -60,6 +68,10 @@ spec:
 """
     }
   }
+  environment {
+    SUITE_NAME = 'soteria'
+    PUSHGATEWAY_URL = 'http://platform-quality-gateway.monitoring.svc.cluster.local:9091'
+  }
   stages {
     stage('Checkout') {
       steps {
@@ -71,13 +83,23 @@ spec:
         container('builder') {
           sh '''
             set -euo pipefail
-            apk add --no-cache bash git jq
+            apk add --no-cache bash git jq curl
             mkdir -p /root/.docker
             cp /docker-config/config.json /root/.docker/config.json
           '''
         }
       }
     }
+    stage('Unit tests') {
+      steps {
+        container('tester') {
+          sh '''
+            set -euo pipefail
+            go test ./...
+          '''
+        }
+      }
+    }
     stage('Compute version') {
       steps {
         container('builder') {
@@ -101,7 +123,9 @@ spec:
             seq 1 10 | while read _; do
               docker info && break || sleep 2
             done
-            docker buildx create --name bstein-builder --driver docker-container --bootstrap --use
+            BUILDER_NAME="soteria-${BUILD_NUMBER}"
+            docker buildx rm "${BUILDER_NAME}" >/dev/null 2>&1 || true
+            docker buildx create --name "${BUILDER_NAME}" --driver docker-container --bootstrap --use
           '''
         }
       }
@@ -123,6 +147,64 @@ spec:
     }
   }
   post {
+    success {
+      container('builder') {
+        sh '''
+          set -euo pipefail
+          suite="${SUITE_NAME}"
+          gateway="${PUSHGATEWAY_URL}"
+          fetch_counter() {
+            status="$1"
+            line="$(curl -fsS "${gateway}/metrics" 2>/dev/null | awk -v suite="${suite}" -v status="${status}" '
+              /^platform_quality_gate_runs_total\{/ {
+                if (index($0, "job=\\"platform-quality-ci\\"") && index($0, "suite=\\"" suite "\\"") && index($0, "status=\\"" status "\\"")) {
+                  print $2
+                  exit
+                }
+              }
+            ' || true)"
+            [ -n "${line}" ] && printf '%s\n' "${line}" || printf '0\n'
+          }
+          ok_count="$(fetch_counter ok)"
+          failed_count="$(fetch_counter failed)"
+          ok_count=$((ok_count + 1))
+          cat <<METRICS | curl -fsS --data-binary @- "${gateway}/metrics/job/platform-quality-ci/suite/${suite}" >/dev/null
+# TYPE platform_quality_gate_runs_total counter
+platform_quality_gate_runs_total{suite="${suite}",status="ok"} ${ok_count}
+platform_quality_gate_runs_total{suite="${suite}",status="failed"} ${failed_count}
+METRICS
+        '''
+      }
+    }
+    failure {
+      container('builder') {
+        sh '''
+          set -euo pipefail
+          suite="${SUITE_NAME}"
+          gateway="${PUSHGATEWAY_URL}"
+          fetch_counter() {
+            status="$1"
+            line="$(curl -fsS "${gateway}/metrics" 2>/dev/null | awk -v suite="${suite}" -v status="${status}" '
+              /^platform_quality_gate_runs_total\{/ {
+                if (index($0, "job=\\"platform-quality-ci\\"") && index($0, "suite=\\"" suite "\\"") && index($0, "status=\\"" status "\\"")) {
+                  print $2
+                  exit
+                }
+              }
+            ' || true)"
+            [ -n "${line}" ] && printf '%s\n' "${line}" || printf '0\n'
+          }
+          ok_count="$(fetch_counter ok)"
+          failed_count="$(fetch_counter failed)"
+          failed_count=$((failed_count + 1))
+          cat <<METRICS | curl -fsS --data-binary @- "${gateway}/metrics/job/platform-quality-ci/suite/${suite}" >/dev/null
+# TYPE platform_quality_gate_runs_total counter
+platform_quality_gate_runs_total{suite="${suite}",status="ok"} ${ok_count}
+platform_quality_gate_runs_total{suite="${suite}",status="failed"} ${failed_count}
+METRICS
+        '''
+      }
+    }
     always {
       script {
         if (fileExists('build.env')) {