chore: add GitHub Actions for auto upstream sync and update SEALData subsample logic (apache#289)

This PR includes the following changes:

1. chore(workflow):
- Add .github/pull.yml to configure pull request rules for automatic
syncing with the upstream apache/main branch, including assignees and
reviewers.
- Add .github/workflows/sync.yml to enable scheduled (every 3 hours) and
manual synchronization of the fork with the upstream repository using
the Fork-Sync-With-Upstream-action. Includes error handling for workflow
suspension.
2. chore(seal):

- Update the SEALData.__call__ method in hugegraph_ml/models/seal.py to
remove the assignment of subsample_ratio for both "train" and other
split types, replacing it with pass statements.
	- Update the file path string formatting for saving subsampled data.

These changes help automate repository maintenance and clarify the
SEALData subsampling logic. No functional changes to model behavior are
introduced.

Author: weijinglin

.github/pull.yml

@@ -0,0 +1,11 @@
+version: "1"
+rules:
+  - base: main
+    upstream: apache/main
+    mergeMethod: rebase
+    assignees:
+      - imbajin
+    reviewers:
+      - imbajin
+    conflictReviewers:
+      - imbajin

.github/workflows/sync.yml

@@ -0,0 +1,39 @@
+name: Upstream Sync
+
+permissions:
+  contents: write
+
+on:
+  schedule:
+    - cron: "0 */3 * * *" # every 3 hours
+  workflow_dispatch:
+
+jobs:
+  sync_latest_from_upstream:
+    name: Sync latest commits from upstream repo
+    runs-on: ubuntu-latest
+    if: ${{ github.event.repository.fork }}
+
+    steps:
+      # Step 1: run a standard checkout action
+      - name: Checkout target repo
+        uses: actions/checkout@v4
+
+      # Step 2: run the sync action
+      - name: Sync upstream changes
+        id: sync
+        uses: aormsby/[email protected]
+        with:
+          upstream_sync_repo: apache/incubator-hugegraph-ai
+          upstream_sync_branch: main
+          target_sync_branch: main
+          target_repo_token: ${{ secrets.GITHUB_TOKEN }} # automatically generated, no need to set
+
+          # Set test_mode true to run tests instead of the true action!!
+          test_mode: false
+
+      - name: Sync check
+        if: failure()
+        run: |
+          echo "[Error] Due to a change in the workflow file of the upstream repository, GitHub has automatically suspended the scheduled automatic update. You need to manually sync your fork. Please refer to the detailed tutorial for instructions: https://github.com/Yidadaa/ChatGPT-Next-Web#enable-automatic-updates"
+          exit 1

hugegraph-ml/src/hugegraph_ml/models/seal.py

@@ -49,6 +49,7 @@
 from scipy.sparse.csgraph import shortest_path
 from tqdm import tqdm
 
+
 class GCN(nn.Module):
     """
     GCN Model
@@ -704,7 +705,7 @@ def __call__(self, split_type):
 
         path = osp.join(
             self.save_dir or "",
-            "f{self.prefix}_{split_type}_{self.hop}-hop_{subsample_ratio}-subsample.bin"
+            f"{self.prefix}_{split_type}_{self.hop}-hop_{subsample_ratio}-subsample.bin",
         )
 
         if osp.exists(path):