chore(master): release 0.15.0

[github-actions]

📦 Release Preparation

0.15.0 (2025-12-08)

Features

• allow read-only operations with wallet addr (#284) (167c148)

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🚀 How to Release

1. Review the changelog and version bump in this PR
2. Merge this PR to trigger the release
3. After merging, the workflow will:
   • Create a GitHub release with tag {{version}}
   • Publish to npm automatically

⚠️ Note: The release has NOT been created yet. It will only be created after you merge this PR.