[Task] — K8s ingress parsers & `IngressReconciler` have zero test

- severity: High; files: `shenyu-kubernetes-controller/src/main/java/org/apache/shenyu/k8s/reconciler/IngressReconciler.java:79`, `.../k8s/parser/IngressParser.java:40`, `.../parser/DivideIngressParser.java:69`, `.../parser/DubboIngressParser.java`, `.../parser/GrpcParser.java`, `.../parser/SofaParser.java`, `.../parser/WebSocketParser.java`, `.../parser/ContextPathParser.java`
- description: The 4 sibling reconcilers (`Endpoints`, `DivideIngress`, `WebSocket`, `Dubbo`) ARE tested, but all parsers and `IngressReconciler` itself are untested. These translate `V1Ingress` → ShenYu selector/rule.
- suggested_fix: Add `IngressReconcilerTest` + parser tests.

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_Identified during the 2026-08-02 deep re-scan; full list in [`docs/scan2-2026-08-02/00-consolidated-critical-high.md`](docs/scan2-2026-08-02/00-consolidated-critical-high.md)._

Start with the existing tests for the Endpoints, DivideIngress, WebSocket, and Dubbo reconcilers, then read IngressReconciler.java and the listed parser classes. Add IngressReconcilerTest and parser tests covering their V1Ingress-to-ShenYu selector/rule translation, and run the Kubernetes controller test suite to verify the coverage.

Written by the indexing model from the issue text.