fix: deep audit PR A — repair skill recipes against the installed stack

[Jammy2211]

Part of #35 (deep audit, phase A of C — do not auto-close). Skill prose review: all 19 mature skills read end-to-end against _style.md, with every code-recipe symbol introspected against the installed 2026.7.6 stack. The review standard was "would this recipe steer a weaker model correctly?" — recipes are executed by whatever model the user runs.

What changed

• al_custom_profile — recipe used three nonexistent APIs (Dictable mixin, _radii_from_grid, _b_n) and directed default-priors YAML into the installed PyAutoGalaxy config (source-edit-boundary violation). Rewritten around the real base-class helpers (elliptical_radii_grid_from, explicit Ciotti–Bertin b_n), workspace config/priors/, explicit no-default-priors gotcha. Corrected recipe executed against the installed stack.
• al_run_slam_pipeline — recipe imported a slam module + slam_pipeline_main driver that have never existed; replaced with the real copy-slam_start_here.py pattern (stages are inline functions chained by af.Result), positions wiring verified.
• al_configure_search — iterations_per_update → iterations_per_quick/full_update; UltraNest/PySwarms removed from the menu (not exposed by installed autofit).
• al_load_results — tracer.einstein_mass_angular_from no longer exists; now routes through al.LensCalc.from_tracer (verified, cited).
• al_inspect_source_reconstruction — invented inversion attributes replaced with verified names (reconstruction, reconstruction_dict, mapped_reconstructed_data); leads with subplot_fit_imaging.
• al_chain_searches — phase-2 recipe used the exact Delaunay+ConstantSplit combination that open regression PyAutoArray#332 crashes on; switched to RectangularUniform+Constant with the regression noted inline; the inspection skill's warning block updated and dated.
• al_debug_fit_failure — mixed-generation aggregator snippet (undefined names, wrong result access) replaced with the load-results-consistent tracer.json + FitImaging pattern.
• al_prepare_imaging_data — recipe ended on a bare interactive plot call; now saves + prints dataset.png and holds for the real-data inspection.
• al_plot_tracer — multi-plane branch referenced the retired PlanePlotter, contradicting its own flat-API preamble.
• _style.md / AGENTS.md — plot-open offer made platform-aware (was macOS-only open); typo fix.

Verified clean (no changes needed): al_run_search, al_build_imaging_model, al_simulate_dataset, al_plot_fit_residuals, al_ingest_paper, al_setup_environment, al_update_wiki, al_refresh_api_docs; al_audit_skill_apis claims spot-checked (its tool is PR B's subject). al_build_interferometer_model got minor accuracy edits (transformer choice documented where it lives; pointless settings= dropped).

Validation

• Symbol audit: 55 files, 116 unique symbols, 0 missing/broken.
• make validate-literature-citations — passes.
• Relative-link sweep over skills/ + AGENTS.md — clean.
• Corrected custom-profile recipe run end-to-end (correct shape, finite, serialises, af.Model integration).
• Tests/smoke: n/a — documentation repo, no test dir / script surface (stated per the ship-gate applicability rules).

Recorded for the next phases (no changes here)

• PR B (tooling): PreToolUse gate's documented PYAUTO_SKIP_API_GATE=1 per-command bypass cannot work (hook reads its own process env, not command text); gate conflates stack-import failure with symbol staleness and repeats the full error wall per symbol; --check-version prints the mismatch wall three times; version pin 2026.5.29.4 vs installed 2026.7.6.649 (standing Heart finding — pin is release-owned).
• PR C (wiki): wiki/core/concepts/non_linear_search.md, wiki/core/api/searches.md tables and wiki/core/index.md still recommend UltraNest/PySwarms; wiki/core edits go through al_update_wiki.

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