fix(dependency-review): only run on opened/reopened, not synchronize

[strawgate]

Problem

The dependency-review.yml workflow triggers on [opened, synchronize, reopened]. The synchronize event fires every time dependabot pushes to a PR branch — typically just a rebase to resolve merge conflicts. This caused PR #2114 to receive two identical Dependency Update Analysis comments (runs 22830029727 and 22830956851).

Root Cause

Dependabot almost never changes the version being bumped on an existing PR. When a newer version is available, it opens a new PR rather than updating the old one. So re-running the analysis on synchronize produces redundant noise with no new information.

Fix

Remove synchronize from the trigger types — keep only opened and reopened.

-    types: [opened, synchronize, reopened]
+    types: [opened, reopened]

[github-actions]

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Troubleshooting

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[github-actions]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository YAML (base), Organization UI (inherited)

Review profile: ASSERTIVE

Plan: Pro

Run ID: 484f6a98-6168-4a34-ba19-39b6c1129555

📥 Commits

Reviewing files that changed from the base of the PR and between 2dbb8e6 and a1f922f.

📒 Files selected for processing (1)

• .github/workflows/dependency-review.yml

✨ Finishing Touches

🧪 Generate unit tests (beta)

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• 🛠️ Update Documentation: Commit on current branch
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