feat: results-inspector MCP server — mirrored core + lens layer

[Jammy2211]

Summary

Adds the read-only results-inspector MCP server, lens edition (autoassistant/mcp/): the core tools are byte-identical mirrors of autofit_assistant:autoassistant/mcp/ (tools.py, __main__.py — diff them when syncing; graduation to an autofit[mcp] extra is the recorded de-dup path), plus this repo's own lens layer — extract/combine named subplot panels and FITS HDUs across every fit in a directory via the al.agg enum groups. Phase 2 of PyAutoLabs/autofit_assistant#12.

Lens tools: list_extractable_images (the al.agg groups/names as "group.name" specs), combine_lens_images (af.AggregateImages, rendered inline in chat), extract_lens_fits (af.AggregateFITS, written only to an explicit destination outside the output directory).

Scripts Changed

• autoassistant/mcp/tools.py, autoassistant/mcp/__main__.py — byte-identical mirrors of the autofit_assistant core
• autoassistant/mcp/lens_tools.py — the lens layer: string-spec resolver over al.agg enums + AggregateImages/AggregateFITS wrappers
• autoassistant/mcp/server.py — mirrored core registrations + the 3 lens tools (10 tools total)
• autoassistant/tests/test_mcp_tools.py — mirrored core tests + lens tests; fixture runs a real tiny fit, then plants a subplot-grid png (named via subplot_filename) and a fit.fits with FITSFit HDUs (10 tests)
• skills/al_inspect_results_mcp.md — new skill (tool table, client config, deployment tiers, mirror/sync rules); registered in skills/README.md + .claude/skills/ symlink
• skills/al_setup_environment.md — one-line pip install mcp note
• autoassistant/audit_skill_apis.py — autoassistant/mcp/*.py joins the symbol-audit scan
• .mcp.json — Claude Code registration

Test Plan

• autoassistant/tests/ — 62 passed (includes the 10 new MCP tests)
• audit_skill_apis.py --scope all — 0 missing/broken (mcp files scanned)
• End-to-end stdio smoke via an MCP client session: 10 tools listed, lens calls green
• Claude Desktop walkthrough (acceptance): combine data/model/residual panels across fits inline

Generated by the PyAutoLabs agent workflow.