chore(release): serialize windows packaging and gitee sync

[xiami762]

Summary

• switch the Windows release packaging workflow to run on published GitHub releases and use the release tag for installer naming
• run the Gitee release sync only after the Windows installer asset has been uploaded to avoid release asset race conditions
• keep the standalone Gitee sync workflow as a manual-only retry path and rename both workflows for clarity

Test plan

• Publish a GitHub release and confirm FlocksSetup-vX.Y.Z.exe is attached before Gitee sync starts
• Verify the same release asset appears in the mirrored Gitee release
• Manually run sync-gitee.yml to confirm retry behavior still works

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