fix: use psutil for reliable CPU and memory metrics

platform/Dockerfile

@@ -11,7 +11,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt flask
+RUN pip install --no-cache-dir -r requirements.txt flask psutil
 
 COPY . .
 EXPOSE 8000

platform/Jenkinsfile

@@ -1,8 +1,12 @@
 pipeline {
     agent any
+    
+    environment {
+        DOCKER_BUILDKIT = '1'
+        BUILDKIT_PROGRESS = 'plain'
+    }
 
     stages {
-
         stage('Checkout') {
             steps {
                 echo '✅ Code checked out from Gitea'
@@ -12,8 +16,16 @@ pipeline {
         stage('Build Docker Image') {
             steps {
                 sh '''
-                    docker build -t management-platform:latest ./platform/
+                    docker pull management-platform:latest 2>/dev/null || true
+                    
+                    docker build \
+                        --cache-from management-platform:latest \
+                        --build-arg BUILDKIT_INLINE_CACHE=1 \
+                        -t management-platform:latest \
+                        ./platform/
+                    
                     echo "✅ Docker image built"
+                    docker images management-platform:latest --format "Size: {{.Size}}"
                 '''
             }
         }
@@ -23,6 +35,7 @@ pipeline {
                 sh '''
                     docker stop management-platform 2>/dev/null || true
                     docker rm management-platform 2>/dev/null || true
+                    
                     docker run -d \
                         --name management-platform \
                         --restart unless-stopped \
@@ -33,10 +46,6 @@ pipeline {
                         -v /etc/shadow:/etc/shadow:ro \
                         -v /root/management-platform/config.py:/app/config.py:ro \
                         -v /root/management-platform/modules:/app/modules:ro \
-                        -v /proc/meminfo:/proc/meminfo:ro \
-                        -v /proc/stat:/proc/stat:ro \
-                        -v /proc/loadavg:/proc/loadavg:ro \
-                        -v /proc/uptime:/proc/uptime:ro \
                         management-platform:latest
                     
                     sleep 5
@@ -56,7 +65,7 @@ pipeline {
             steps {
                 sh '''
                     sleep 3
-                    if curl -f http://localhost:8088/health 2>/dev/null || curl -f http://173.249.20.244:8088/ 2>/dev/null; then
+                    if curl -f http://localhost:8088/ 2>/dev/null; then
                         echo "✅ Platform responding"
                     else
                         echo "⚠️ Health check failed"
@@ -70,11 +79,10 @@ pipeline {
     post {
         success { 
             echo '✅ Pipeline succeeded — platform deployed'
-            // Optionnel: notification
+            sh 'docker image prune -f --filter "until=24h" 2>/dev/null || true'
         }
         failure { 
             echo '❌ Pipeline failed — check logs'
-            // Afficher les logs Docker en cas d'échec
             sh 'docker logs management-platform --tail=30 2>/dev/null || true'
         }
     }