Resets the deployment algorithm policy to the DEFAULT template configuration.

This operation ensures the deployment always has a valid policy in place by:

1. Deactivating the current custom policy (if any)
2. Creating a new policy based on the DEFAULT template
3. Applying the template's allow-all configuration

Unlike DELETE operations in tenant policies, deployment policies cannot be truly
deleted as they serve as the fallback for all tenants. This reset operation
guarantees system stability while returning to a known-good configuration.

The DEFAULT template allows all algorithms without restrictions.