fix(deploy): use matomo.php for liveness/readiness probes

/index.php returns 302 after tables are created (installer redirect),
which fails k8s HTTP probes. /matomo.php is the tracker endpoint and
always returns 200 regardless of installation state. Also add
timeoutSeconds: 5 since PHP startup can exceed the 1s default.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

deploy/matomo-deployment.yaml

@@ -40,6 +40,13 @@ spec:
                 secretKeyRef:
                   name: matomo-secret
                   key: MYSQL_PASSWORD
+            # Traefik terminates SSL; tell Matomo to trust X-Forwarded-* headers
+            - name: MATOMO_GENERAL_ASSUME_SECURE_PROTOCOL
+              value: "1"
+            - name: MATOMO_GENERAL_PROXY_CLIENT_HEADERS
+              value: HTTP_X_FORWARDED_FOR
+            - name: MATOMO_GENERAL_PROXY_HOST_HEADERS
+              value: HTTP_X_FORWARDED_HOST
           ports:
             - containerPort: 80
           volumeMounts:
@@ -47,16 +54,18 @@ spec:
               mountPath: /var/www/html
           livenessProbe:
             httpGet:
-              path: /index.php
+              path: /matomo.php
               port: 80
             initialDelaySeconds: 60
             periodSeconds: 30
+            timeoutSeconds: 5
           readinessProbe:
             httpGet:
-              path: /index.php
+              path: /matomo.php
               port: 80
             initialDelaySeconds: 30
             periodSeconds: 10
+            timeoutSeconds: 5
           resources:
             requests:
               cpu: 100m