Add analyze map connected components and suggested probes

[yuechen-li-dev]

Motivation

• Make aetheris analyze map --views six --llm --json produce machine-readable, conservative topology hints so LLMs do not have to manually parse ASCII compact grids to find holes/plateaus/curved regions.
• Provide actionable next steps by suggesting ready-to-copy follow-up point probes (CLI commands) that disambiguate interior no-hit islands, curved clusters, and approximate/tessellated regions.

Description

• Added new Six-view schema records (SixViewMapComponents, MapComponent, CellBoundingBox, SuggestedMapProbe) to StepAnalysisModels.cs and extended SixViewMapResult / SixViewMapView to carry per-view components and per-view/top-level suggested probes.
• Implemented conservative 4-connected component analysis in StepAnalyzer.cs (FindComponents + BuildSixViewComponents) that groups: no-hit components, height/depth band components (rounded scalar bands), surface-family components, and tessellated-fallback components, computing bbox/cell counts/centroids/backend dominance and confidence hints.
• Implemented BuildSuggestedProbes to emit centroid-based probe suggestions (per-view and a bounded global list) with ready-to-copy CLI commands; applied output limits and truncation reporting (max 10 components/category/view, max 10 probes/view, max 30 global probes with truncated/omittedCount).
• Updated measured summary wording to conservatively mention interior no-hit candidates, border-touching silhouette gaps, and curved-family clusters; added A5 docs and forward links; updated tests to validate new fields; explicitly does not perform feature reconstruction or assert semantic features as facts.

Testing

• Ran dotnet restore Aetheris.slnx and dotnet build Aetheris.slnx -f net10.0 --no-restore /m:1 and the build succeeded without errors.
• Ran focused CLI unit tests dotnet test Aetheris.CLI.Tests/Aetheris.CLI.Tests.csproj -f net10.0 --filter "AnalyzeMap|SixView|Components|Probes|Torus|Cylinder|Fallback|Ruled" which passed (13 tests).
• Performed CLI smoke runs: aetheris analyze map testdata/step242/nist/FTC/nist_ftc_09_asme1_ap242-e1.stp --views six --resolution 16x16 --llm --json produced a six-view-summary with 6 views, 26 global suggested probes and 59 total reported components; aetheris analyze map testdata/step242/generated/ruled-a2/ellipse-linear-extrusion-production.step --views six --resolution 8x8 --llm --json produced a six-view summary with components and probes (6 global probes, 6 total components).
• Also validated dotnet run --project Aetheris.CLI -- --help; git diff --check and repository status were clean after commit.

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Codex Task