Setup OIDC for CodSpeed authentication

[Boshen]

Summary

• Add id-token: write permission at job level for OIDC authentication with CodSpeed
• Remove token parameter from CodSpeedHQ action (OIDC auth is now automatic)

This configures the workflow to use OpenID Connect (OIDC) for authentication with CodSpeed instead of using repository secrets.

🤖 Generated with Claude Code

[codspeed-hq]

CodSpeed Performance Report

Merging #125 will not alter performance

_{Comparing codspeed-oidc (9db0336) with main (a0ef895)¹}

Summary

✅ 4 untouched

Footnotes

1. No successful run was found on main (5d5d724) during the generation of this report, so a0ef895 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩