Merge upstream/master-vnext into feature/add-network-policy

Resolve conflicts by combining NetworkPolicy feature with all features from
master-vnext integration branch:
- NetworkPolicy support (this branch)
- HTTPRoute support
- envFrom support
- Startup probe
- Cache persistence
- IPv6 dual-stack
- revisionHistoryLimit
- initContainers deprecation

Updated version to 3.0.0 and merged all changelog entries.
Regenerated README.md from template.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Aleksei Sviridkin <f@lex.la>

charts/jellyfin/README.md.gotmpl

@@ -59,6 +59,33 @@ helm install my-jellyfin jellyfin/jellyfin -f values.yaml
 
 {{ template "helm-docs.versionFooter" . }}
 
+## Gateway API HTTPRoute
+
+This chart supports the Kubernetes Gateway API HTTPRoute resource as a modern alternative to Ingress.
+
+To use HTTPRoute, you need to have Gateway API CRDs installed in your cluster and a Gateway resource configured.
+
+Example configuration:
+
+```yaml
+httpRoute:
+  enabled: true
+  annotations: {}
+  parentRefs:
+    - name: my-gateway
+      namespace: gateway-system
+      sectionName: https
+  hostnames:
+    - jellyfin.example.com
+  rules:
+    - matches:
+        - path:
+            type: PathPrefix
+            value: /
+```
+
+For more information about Gateway API, see: <https://gateway-api.sigs.k8s.io/>
+
 ## Hardware acceleration
 
 Out of the box the pod does not have the necessary permissions to enable hardware acceleration (HWA) in Jellyfin.
@@ -286,3 +313,32 @@ networkPolicy:
 - Either disable NetworkPolicy or disable host networking
 
 For more configuration options, see the full values documentation in [values.yaml](values.yaml).
+
+## IPv6 Configuration
+
+This chart supports IPv6 and dual-stack networking configurations out of the box. Health probes use httpGet by default for compatibility with both IPv4 and IPv6.
+
+### IPv6-only Configuration
+
+For IPv6-only clusters:
+
+```yaml
+service:
+  ipFamilyPolicy: SingleStack
+  ipFamilies:
+    - IPv6
+```
+
+### Dual-stack Configuration
+
+For dual-stack clusters (both IPv4 and IPv6):
+
+```yaml
+service:
+  ipFamilyPolicy: PreferDualStack  # or RequireDualStack
+  ipFamilies:
+    - IPv4
+    - IPv6  # First family in the list is the primary
+```
+
+For more information about Kubernetes dual-stack networking, see: <https://kubernetes.io/docs/concepts/services-networking/dual-stack/>