feat: add OAuth grants management (list + revoke)

[dielduarte]

Summary

Adds OAuth grant management to the Python SDK, mirroring resend-node#998.

• resend.OAuthGrants.list(params?) → GET /oauth/grants (paginated via limit / before / after)
• resend.OAuthGrants.revoke(oauth_grant_id) → DELETE /oauth/grants/{oauth_grant_id}
• Async variants: list_async / revoke_async
• New exported types: OAuthGrant, OAuthGrantClient

Usage

import resend
resend.api_key = "re_..."

grants = resend.OAuthGrants.list({"limit": 20})
resend.OAuthGrants.revoke(oauth_grant_id="grant_id")

Notes

• resource field omitted. The Node PR still carries it, but per the launch thread it's a dead field being removed from the API everywhere ("assume it doesn't exist"), so it's intentionally not modeled here.
• Delete method named revoke (not remove) to match the Node SDK and the API semantics — a grant is revoked (it stays in the list with revoked_at set), not deleted.

Docs

• https://resend.com/docs/api-reference/oauth/list-grants
• https://resend.com/docs/api-reference/oauth/revoke-grant

Testing

• 11 new tests (sync + async); full suite: 459 passed
• mypy --strict clean

---

Summary by cubic

Adds OAuth grant management to the Python SDK. List grants with pagination and revoke them, sync and async, via resend.OAuthGrants. Includes sync/async usage examples.

• New Features
  • resend.OAuthGrants.list(params?) → GET /oauth/grants with limit, before, after.
  • resend.OAuthGrants.revoke(oauth_grant_id) → DELETE /oauth/grants/{oauth_grant_id}; revoked grants show revoked_at.
  • Async methods: list_async, revoke_async.
  • Exported from resend and resend.oauth_grants: OAuthGrants, OAuthGrant, OAuthGrantClient; deprecated resource field omitted. Test names updated to drop “should” per project convention.
  • Examples: examples/oauth_grants.py and examples/async/oauth_grants_async.py.

^{Written for commit 0cbe1c6. Summary will update on new commits.}

[cubic-dev-ai]

All reported issues were addressed across 8 files

Confidence score: 5/5

• Safe to merge after the addressed issues were fixed.

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[cubic-dev-ai]

0 issues found across 2 files (changes from recent commits).

<sub>Requires human review: Adds new OAuth grants feature (list+revoke), new module, types, and version bump. Requires human review to validate API design and production readiness.

Re-trigger cubic</sub>

[cubic-dev-ai]

0 issues found across 1 file (changes from recent commits).

<sub>Auto-approved: Adds OAuth grants list and revoke functionality with sync/async support and tests. No changes to existing core logic.

Re-trigger cubic</sub>

[cubic-dev-ai]

0 issues found across 2 files (changes from recent commits).

<sub>Auto-approved: Adds new OAuth grants list/revoke endpoints with types, examples, and tests. No changes to core logic or infrastructure; low risk addition to API wrappers.

Re-trigger cubic</sub>