chore: enable Issue management automation

.github/workflows/issue-lifecycle.yml

@@ -0,0 +1,58 @@
+name: Issue lifecycle
+
+on:
+  issues:
+    types:
+      - opened
+      - edited
+      - assigned
+      - unassigned
+      - labeled
+      - unlabeled
+      - closed
+      - reopened
+      - field_added
+      - field_removed
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+      - reopened
+      - labeled
+      - unlabeled
+      - ready_for_review
+      - review_requested
+  pull_request_review:
+    types:
+      - submitted
+
+permissions:
+  contents: read
+
+concurrency:
+  group: issue-lifecycle-${{ github.event.issue.number || github.event.pull_request.number || github.run_id }}
+  cancel-in-progress: false
+
+jobs:
+  lifecycle:
+    name: Issue lifecycle
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out trusted policy
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
+        with:
+          ref: ${{ github.event.repository.default_branch }}
+          persist-credentials: false
+      - name: Create project token
+        id: app-token
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1
+        with:
+          client-id: ${{ vars.DSH_ISSUE_APP_CLIENT_ID }}
+          private-key: ${{ secrets.DSH_ISSUE_APP_PRIVATE_KEY }}
+          owner: deepseek-harness
+          repositories: deepseek-harness
+      - name: Handle repository event
+        env:
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+        run: node .github/issue-management/policy.mjs lifecycle

.github/workflows/issue-policy.yml

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+name: Issue policy
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened, labeled, unlabeled, ready_for_review, review_requested]
+  pull_request_review:
+    types: [submitted]
+
+permissions:
+  contents: read
+  issues: read
+  pull-requests: read
+
+jobs:
+  policy:
+    name: Issue policy
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out trusted policy
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
+        with:
+          ref: ${{ github.event.repository.default_branch }}
+          persist-credentials: false
+      - name: Validate pull request
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        run: node .github/issue-management/policy.mjs pr