Add notify-conanfiles workflow

.github/workflows/notify-conanfiles.yaml

@@ -0,0 +1,55 @@
+name: Notify conanfiles
+
+run-name: notify conanfiles for ${{ github.ref_name }}
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+permissions:
+  contents: read
+
+jobs:
+  # When a new release tag is pushed to milvus-common, send a repository_dispatch event
+  # to the conanfiles repo to trigger the release of the corresponding Conan package.
+  dispatch:
+    name: send milvus-common release dispatch
+    if: github.repository == 'zilliztech/milvus-common'
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Send repository_dispatch to conanfiles
+        env:
+          GH_TOKEN: ${{ secrets.CONANFILES_DISPATCH_TOKEN }}
+          TAG: ${{ github.ref_name }}
+          SOURCE_REPO: zilliztech/milvus-common
+        run: |
+          set -euo pipefail
+
+          if [ -z "$GH_TOKEN" ]; then
+            echo "CONANFILES_DISPATCH_TOKEN is not configured" >&2
+            exit 1
+          fi
+
+          if [[ ! "$TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z][0-9A-Za-z.-]*)?$ ]]; then
+            echo "Unsupported tag format: $TAG" >&2
+            exit 1
+          fi
+
+          COMMIT=$(git rev-list -n 1 "$TAG")
+          if [ -z "$COMMIT" ]; then
+            echo "Unable to resolve commit for tag: $TAG" >&2
+            exit 1
+          fi
+
+          gh api repos/milvus-io/conanfiles/dispatches \
+            --method POST \
+            --field event_type=recipe-release \
+            --field "client_payload[tag]=${TAG}" \
+            --field "client_payload[commit]=${COMMIT}" \
+            --field "client_payload[source_repo]=${SOURCE_REPO}"