Function setProjectRetentionPolicy

setProjectRetentionPolicy(
params: SetProjectRetentionPolicyParams,
): Promise<{ policy_id: string | null; project_id: string }>
Assign an existing trace retention policy to a project, or reset the project to the default policy.

This helper only changes the project's assignment. It does not create, retrieve, update, or delete retention policies.
Parameters
- params: SetProjectRetentionPolicyParams
  The project and policy assignment.
Returns Promise<{ policy_id: string | null; project_id: string }>
The project's resulting retention-policy assignment.
Example
```
import { setProjectRetentionPolicy } from "@arizeai/phoenix-client/projects";

await setProjectRetentionPolicy({
  projectName: "support-bot",
  policyId: "UHJvamVjdFRyYWNlUmV0ZW50aW9uUG9saWN5OjI=",
});

await setProjectRetentionPolicy({
  projectId: "UHJvamVjdDox",
  policyId: null,
});
```
- Defined in packages/phoenix-client/src/projects/setProjectRetentionPolicy.ts:57