Refactor the dedupe workflow by extracting a reusable workflow to opensearch-build

.github/workflows/issue-dedupe.yml

@@ -0,0 +1,43 @@
+---
+name: Issue Dedupe
+on:
+  issues:
+    types: [opened]
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+    inputs:
+      job:
+        description: 'Job to run'
+        required: true
+        type: choice
+        options:
+          - detect
+          - auto-close
+        default: detect
+      issue_number:
+        description: 'Issue number to check for duplicates (detect only)'
+        required: false
+        type: string
+
+jobs:
+  detect:
+    if: github.event_name == 'issues' || (github.event_name == 'workflow_dispatch' && inputs.job == 'detect')
+    uses: qianheng-aws/opensearch-build/.github/workflows/issue-dedupe-detect.yml@add-issue-dedupe-workflow
+    permissions:
+      contents: read
+      issues: write
+      id-token: write
+    secrets:
+      BEDROCK_ACCESS_ROLE_ISSUE: ${{ secrets.BEDROCK_ACCESS_ROLE_ISSUE }}
+    with:
+      issue_number: ${{ inputs.issue_number || '' }}
+      grace_days: ${{ vars.DUPLICATE_GRACE_DAYS || '7' }}
+
+  auto-close:
+    if: github.event_name == 'schedule' || (github.event_name == 'workflow_dispatch' && inputs.job == 'auto-close')
+    uses: qianheng-aws/opensearch-build/.github/workflows/issue-dedupe-autoclose.yml@add-issue-dedupe-workflow
+    permissions:
+      issues: write
+    with:
+      grace_days: ${{ vars.DUPLICATE_GRACE_DAYS || '7' }}