chore: test of migration with prf key

[kc1212]

Description of changes

It turned out that by adding prf keygen, we're already doing the migration implicitly. This PR adds a proper test of migration keygen.

Issue ticket number and link

Closes zama-ai/kms-internal#3010

PR Checklist

I attest that all checked items are satisfied. Any deviation is clearly justified above.

• Title follows conventional commits (e.g. chore: ...).
• Tests added for every new pub item and test coverage has not decreased.
• Public APIs and non-obvious logic documented; unfinished work marked as TODO(#issue).
• unwrap/expect/panic only in tests or for invariant bugs (documented if present).
• No dependency version changes OR (if changed) only minimal required fixes.
• No architectural protocol changes OR linked spec PR/issue provided.
• No breaking deployment config changes OR devops label + infra notified + infra-team reviewer assigned.
• No breaking gRPC / serialized data changes OR commit marked with ! and affected teams notified.
• No modifications to existing versionized structs OR backward compatibility tests updated.
• No critical business logic / crypto changes OR ≥2 reviewers assigned.
• No new sensitive data fields added OR Zeroize + ZeroizeOnDrop implemented.
• No new public storage data OR data is verifiable (signature / digest).
• No unsafe; if unavoidable: minimal, justified, documented, and test/fuzz covered.
• Strongly typed boundaries: typed inputs validated at the edge; no untyped values or errors cross modules.
• Self-review completed.

Dependency Update Questionnaire (only if deps changed or added)

Answer in the Cargo.toml next to the dependency (or here if updating):

1. Ownership changes or suspicious concentration?
2. Low popularity?
3. Unusual version jump?
4. Lacking documentation?
5. Missing CI?
6. No security / disclosure policy?
7. Significant size increase?

More details and explanations for the checklist and dependency updates can be found in CONTRIBUTING.md

[github-actions]

Consolidated Tests Results 2026-05-06 - 11:09:22

Test Results

12 passed

Details

12 tests
not captured
junit-to-ctrf
build-and-test test-reporter #1926
chore: test of migration with prf key #572

test-reporter: Run #1926

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
12	12	0	0	0	0	0	not captured

🎉 All tests passed!

Tests

View All Tests

Test Name	Status	Flaky	Duration
k8s_test_crs_uniqueness	✅		32.3s
k8s_test_insecure_keygen_encrypt_and_public_decrypt	✅		2m 8s
k8s_test_insecure_keygen_encrypt_multiple_types	✅		2m 21s
k8s_test_keygen_and_crs	✅		2m 3s
k8s_test_keygen_uniqueness	✅		5m 20s
k8s_test_crs_uniqueness	✅		34.4s
k8s_test_insecure_keygen_encrypt_and_public_decrypt	✅		2m 30s
k8s_test_insecure_keygen_encrypt_multiple_types	✅		2m 32s
k8s_test_keygen_and_crs	✅		2m 12s
k8s_test_keygen_uniqueness	✅		5m 46s
k8s_test_centralized_insecure	✅		1m 2s
nightly_full_gen_tests_default_k8s_centralized_sequential_crs	✅		1.9s

_{🍂 No flaky tests in this run.}

Github Test Reporter by CTRF 💚

🔄 This comment has been updated

[Copilot]

Pull request overview

Adds explicit slow-tests coverage for the “compressed keygen from existing shares” migration path when OPRF private-key shares may already exist or be missing (legacy material), and updates test helpers to control copy_compressed_key_to_original behavior.

Changes:

• Split the existing “compressed keygen from existing” test into two slow-tests to cover both “OPRF present” and “OPRF missing” scenarios.
• Add utilities to rewrite stored key material to simulate legacy fixtures missing dedicated OPRF shares and restart servers from disk material.
• Extend keygen_config_from_existing test helper to pass through copy_compressed_key_to_original.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
core/service/src/client/tests/threshold/key_gen_tests.rs	Adds two migration-focused tests plus helper routines to simulate legacy missing-OPRF material and restart servers from persisted storage.
core/service/src/client/tests/common.rs	Extends the test helper to configure copy_compressed_key_to_original in KeySetAddedInfo.

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[jot2re]

LGTM besides Daniel's comment

[dd23]

Thanks, LGTM!

[jot2re]

LGTM