test(drive): improve identity key fetch, prove, and queries coverage

[QuantumExplorer]

Summary

Adds 54 tests across 4 files in rs-drive identity key module, targeting the lowest-coverage areas.

File	New Tests	Coverage Before	What's covered
key/queries.rs	4	0%	fetch_identities_all_keys_query for single/multiple/empty IDs
key/fetch/mod.rs	37	59%	All IdentityKeysRequest constructors, into_path_query for every variant, processing_cost, helper conversion functions
key/prove/prove_identity_keys/mod.rs	3	41%	Prove with AllKeys, SpecificKeys, LatestAuthenticationMasterKey
key/prove/prove_identities_all_keys/mod.rs	3	—	Single/multiple identity proving with limit

Test plan

• cargo test -p drive --lib -- identity::key passes
• cargo fmt --all clean
• CI

🤖 Generated with Claude Code

Summary by CodeRabbit

• Tests
  • Added comprehensive test coverage for identity key operations, including fetching, proving, and querying functionality across various request types and scenarios.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 766b4f5e-87d3-4c2b-928c-c8765c4c49eb

📥 Commits

Reviewing files that changed from the base of the PR and between e4efd88 and 93c4970.

📒 Files selected for processing (4)

• packages/rs-drive/src/drive/identity/key/fetch/mod.rs
• packages/rs-drive/src/drive/identity/key/prove/prove_identities_all_keys/mod.rs
• packages/rs-drive/src/drive/identity/key/prove/prove_identity_keys/mod.rs
• packages/rs-drive/src/drive/identity/key/queries.rs

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📝 Walkthrough

Walkthrough

This PR adds comprehensive unit and integration test coverage across four identity key management modules, validating request constructors, path/query structures, processing costs, fetch operations, and proof generation with various configuration scenarios.

Changes

Cohort / File(s)	Summary
Identity Keys Fetch Tests packages/rs-drive/src/drive/identity/key/fetch/mod.rs	Added 862 lines of tests covering IdentityKeysRequest constructor helpers for all key types, into_path_query output structure validation, processing_cost correctness across request types, element-to-public-key conversions, and integration tests for drive.fetch_identity_keys with KeyIDHashSet, KeyIDVec, and SerializedKeyVec result types.
Identity Keys Prove Tests packages/rs-drive/src/drive/identity/key/prove/prove_identities_all_keys/mod.rs, packages/rs-drive/src/drive/identity/key/prove/prove_identity_keys/mod.rs	Added 240 lines across two modules with unit tests verifying Drive::prove_identities_all_keys and Drive::prove_identity_keys with single/multiple identity configurations, various query request types, limit parameters, and assertion of non-empty proof generation.
Identity Keys Query Tests packages/rs-drive/src/drive/identity/key/queries.rs	Added 71 lines of tests validating Drive::fetch_identities_all_keys_query construction for single and multiple identities, error handling for empty identity slices, and limit parameter propagation.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

🐰 With tests we hop and skip with glee,
Identity keys now verified, you see!
Each function proved from end to start,
Coverage grows, a rabbit's art! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: adding test coverage for identity key fetch, prove, and queries functionality in the drive module.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch test/drive-identity-key-coverage

---

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[thepastaclaw]

Review Gate

Commit: 93c4970e

• ⏳ Debounce: 4m ago (need 30m)

• ⏳ CI checks: checks still running (4 pending)

• ✅ CodeRabbit review: comment found

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[codecov]

Codecov Report

❌ Patch coverage is 98.22785% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.17%. Comparing base (8a83981) to head (93c4970).
⚠️ Report is 7 commits behind head on v3.1-dev.

Files with missing lines	Patch %	Lines
...kages/rs-drive/src/drive/identity/key/fetch/mod.rs	98.48%	9 Missing ⚠️
...ackages/rs-drive/src/drive/identity/key/queries.rs	88.88%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           v3.1-dev    #3442      +/-   ##
============================================
+ Coverage     80.66%   81.17%   +0.51%     
============================================
  Files          2852     2852              
  Lines        285371   290349    +4978     
============================================
+ Hits         230190   235689    +5499     
+ Misses        55181    54660     -521     

Components	Coverage Δ
dpp	74.38% <ø> (+1.09%)	⬆️
drive	83.06% <98.22%> (+0.56%)	⬆️
drive-abci	86.70% <ø> (ø)
sdk	36.55% <ø> (ø)
dapi-client	79.06% <ø> (ø)
platform-version	∅ <ø> (∅)
platform-value	92.00% <ø> (+1.21%)	⬆️
platform-wallet	76.09% <ø> (ø)
drive-proof-verifier	55.26% <ø> (ø)

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