feat: cache SSH output between discovery and reasoning phases (#2899)

[rysweet]

Summary

• Adds TTL-based SSH output cache to SessionManager
• Repeated capture_output() calls within TTL window reuse cached results
• Reduces SSH overhead during discovery→reasoning transition
• Cache keys include VM name and command to prevent cross-session contamination

Fixes #2899

Test plan

• Run uv run pytest tests/outside_in/test_cache_ssh_output.py -v (12/12 pass)
• Verify cache hit/miss behavior with TTL expiry
• CI passes

Quality audit results

• Import path fixed (amplifier_bundle → sys.path-based import)
• Test assertion fixed for cross-session cache independence
• No stubs, no dead code, proper error handling for nonexistent sessions

🤖 Generated with Claude Code

[github-actions]

🤖 Auto-fixed version bump

The version in pyproject.toml has been automatically bumped to the next patch version.

If you need a minor or major version bump instead, please update pyproject.toml manually and push the change.

[github-actions]

🤖 Auto-fixed version bump

The version in pyproject.toml has been automatically bumped to the next patch version.

If you need a minor or major version bump instead, please update pyproject.toml manually and push the change.

[github-actions]

Repo Guardian - Passed

All changed files have been reviewed:

• session.py (3 copies): Production code implementing SSH output caching with proper documentation
• test_cache_ssh_output.py: Comprehensive test suite following pytest conventions
• pyproject.toml: Standard version bump

All files are durable components suitable for the repository. No ephemeral content detected.

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[github-actions]

🤖 Auto-fixed version bump

The version in pyproject.toml has been automatically bumped to the next patch version.

If you need a minor or major version bump instead, please update pyproject.toml manually and push the change.