refactor: use TaskRun directly, drop Pipeline wrapper

Pipeline was a pass-through wrapping one Task — unnecessary indirection.
CI now creates TaskRun directly against the integration-test Task.

k8s/tekton/ci-rbac.yaml

@@ -15,12 +15,9 @@ metadata:
   name: ci-tekton-trigger
   namespace: api
 rules:
-- apiGroups: ["tekton.dev"]
-  resources: ["pipelineruns"]
-  verbs: ["create", "get", "list", "watch", "delete"]
 - apiGroups: ["tekton.dev"]
   resources: ["taskruns"]
-  verbs: ["get", "list"]
+  verbs: ["create", "get", "list", "watch", "delete"]
 - apiGroups: [""]
   resources: ["pods", "pods/log"]
   verbs: ["get", "list"]

k8s/tekton/kustomization.yaml

@@ -6,7 +6,6 @@ namespace: api
 resources:
 - ci-rbac.yaml
 - task-integration-test.yaml
-- pipeline-integration-test.yaml
 
 generatorOptions:
   disableNameSuffixHash: true

k8s/tekton/pipeline-integration-test.yaml

@@ -1,30 +0,0 @@
-apiVersion: tekton.dev/v1
-kind: Pipeline
-metadata:
-  name: integration-test-pipeline
-  namespace: api
-  labels:
-    app: api-gateway
-    component: testing
-spec:
-  description: >
-    Run integration tests against a gateway image.
-    Spins up the image as a sidecar, tests via curl, reports pass/fail.
-  params:
-  - name: image
-    type: string
-    description: "Container image to test (repo:sha)"
-  results:
-  - name: test-result
-    description: "pass or fail"
-    value: $(tasks.integration-test.results.result)
-  - name: test-summary
-    description: "e.g. 8/8 passed"
-    value: $(tasks.integration-test.results.summary)
-  tasks:
-  - name: integration-test
-    taskRef:
-      name: integration-test
-    params:
-    - name: image
-      value: $(params.image)