fix: publish stable release assets for convex-sync

[anandpant]

Summary

• use path-scoped release-please outputs for the apps/convex-sync package
• move release archive jobs onto the 4-core Depot runner
• backfill the missing assets on v0.0.2

Root Cause

The stable release path started creating the real GitHub release correctly, but the asset jobs were still gated on the root-only outputs:

• release_created
• tag_name

Since this repo now releases from apps/convex-sync, those jobs were skipped and v0.0.2 was created with no assets.

Changes

• release.yml
  • switch job outputs to:
    • apps/convex-sync--release_created
    • apps/convex-sync--tag_name
  • keep paths_released available
  • move archive build to depot-ubuntu-latest-4
• release-rc.yml
  • move prerelease archive build to depot-ubuntu-latest-4
• .github/actionlint.yaml
  • allow depot-ubuntu-latest-4

Backfill

I also manually attached the missing stable assets to the already-published v0.0.2 release:

• convex-sync_v0.0.2_linux_amd64.tar.gz
• SHA256SUMS

Verification

• cargo fmt --all --check
• cargo test --workspace
• cargo run -p convex-sync -- --version
• actionlint -config-file .github/actionlint.yaml .github/workflows/*.yml .depot/workflows/*.yml
• verified v0.0.2 now has uploaded assets via gh release view v0.0.2 --json assets

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

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