Add entity lifecycle status MCP tools (apps + components)

[bburda]

Summary

Add ros2_medkit_status_get and ros2_medkit_status_set MCP tools (with sovd_status_get / sovd_status_set back-compat aliases), wrapping the gateway 0.6.0 entity lifecycle API. status_get reads the readiness status; status_set triggers a transition (start / restart / force-restart / shutdown / force-shutdown). Restricted to apps and components; other entity types and unknown actions are rejected with a clear error.

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Issue

• closes Add entity lifecycle status MCP tools (apps + components) #22

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Type

• Bug fix
• New feature
• Breaking change
• Documentation only

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Testing

In a worktree branched from origin/main (post-0.6.0-migration):

• run_tests.py - 184 passed (168 baseline + 16 new lifecycle/tool/arg-model tests)
• ruff check src/ tests/ - clean
• ruff format --check src/ tests/ - clean
• mypy src/ - clean

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Checklist

• Breaking changes are clearly described (none - additive feature)
• Linting passes (poetry run ruff check src/ tests/)
• Formatting passes (poetry run ruff format --check src/ tests/)
• Type checking passes (poetry run mypy src/)
• Tests pass (poetry run python run_tests.py)
• Docs were updated if behavior or public API changed (README lifecycle tools section)

[Copilot]

Pull request overview

This PR adds first-class MCP tool support for the ros2_medkit gateway (v0.6.0) entity lifecycle status API, allowing clients to query readiness state and trigger lifecycle transitions for apps and components (with sovd_* aliases preserved for backward compatibility).

Changes:

• Added lifecycle argument models (LifecycleEntityType, LifecycleAction, StatusGetArgs, StatusSetArgs) to validate entity-type and action inputs.
• Added two new MCP tools (ros2_medkit_status_get, ros2_medkit_status_set) plus sovd_status_get / sovd_status_set aliases, wiring dispatch through to the client.
• Implemented lifecycle API support in SovdClient (get_status, set_status) and added corresponding unit tests and README documentation.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/ros2_medkit_mcp/client.py	Adds lifecycle endpoint routing, validation, and get_status/set_status client methods backed by generated lifecycle API functions.
src/ros2_medkit_mcp/models.py	Introduces Pydantic argument models/enums for lifecycle status tools with strict validation (apps/components + allowed actions).
src/ros2_medkit_mcp/mcp_app.py	Registers the new MCP tools, adds aliases, and dispatches tool calls to the new client lifecycle methods.
tests/test_new_tools.py	Adds integration-style client tests for lifecycle GET/PUT behavior and input rejection cases.
tests/test_mcp_app.py	Adds unit tests for tool alias resolution and Pydantic validation of lifecycle argument models.
README.md	Documents the new lifecycle tools and their arguments/return behavior.