chore: bump version from 0.5.0 to 0.5.1

[nv-nmailhot]

Bump the workspace, Python package, and Helm chart to 0.5.1 per the "Bumping the ModelExpress Version" procedure in CLAUDE.md, and recompute the pinned mx_source_id hashes on both the Python and Rust sides.

Public release-image tag references are deliberately untouched; those move only after the 0.5.1 container is published on NGC.

Cargo.lock and uv.lock were regenerated on main rather than taken from the cherry-pick, so they carry only the four workspace crate versions.

(cherry picked from commit fb42bb6)

Summary by CodeRabbit

• Release

  • Updated the platform and client package versions to 0.5.1.
  • Updated the Helm application and chart versions to 0.5.1.

• Documentation

  • Updated version references and configuration examples to reflect 0.5.1.

• Tests

  • Updated version-dependent fixtures, expected source identities, and artifact transfer validations for the new release.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 2e1779d3-e203-4167-b195-2423ca55f5b3

📥 Commits

Reviewing files that changed from the base of the PR and between 46da339 and 27c3574.

⛔ Files ignored due to path filters (2)

• Cargo.lock is excluded by !**/*.lock
• modelexpress_client/python/uv.lock is excluded by !**/*.lock

📒 Files selected for processing (13)

• Cargo.toml
• docs/metadata.md
• helm/Chart.yaml
• modelexpress_client/python/pyproject.toml
• modelexpress_client/python/tests/test_artifact_transfer.py
• modelexpress_client/python/tests/test_k8s_service_client.py
• modelexpress_client/python/tests/test_source_id.py
• modelexpress_client/python/tests/test_vllm_artifacts.py
• modelexpress_server/src/p2p/backend/redis.rs
• modelexpress_server/src/p2p/service.rs
• modelexpress_server/src/p2p/source_identity.rs
• modelexpress_server/src/p2p/state.rs
• workspace-tests/tests/artifact_transfer_contract.rs

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Walkthrough

Changes

Version Alignment

Layer / File(s)	Summary
Release metadata updates Cargo.toml, modelexpress_client/python/pyproject.toml, helm/Chart.yaml, docs/metadata.md	Release metadata and documentation examples now use version 0.5.1.
Source identity expectations modelexpress_client/python/tests/test_source_id.py, modelexpress_server/src/p2p/source_identity.rs	Source identity fixtures and expected hashes now reflect 0.5.1.
Artifact and service fixtures modelexpress_client/python/tests/*, modelexpress_server/src/p2p/{backend/redis.rs,service.rs,state.rs}, workspace-tests/tests/artifact_transfer_contract.rs	Artifact, Redis, service, state, and contract test fixtures now use 0.5.1.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Mergeability Score: ⚪ Minimal · up to 27c35

This PR updates the workspace, package, chart, lockfiles, tests, and source-identity hashes for version 0.5.1 without changing release-image references; no actionable merge-blocking risk remains beyond normal checks and review.

Poem

I’m a rabbit with a release in sight,
Version numbers now match just right.
Hashes hop to 0.5.1,
Tests align, their work is done.
Carrots for every green build tonight!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the primary change: updating the project version from 0.5.0 to 0.5.1.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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