Harden route-stability: fix is_self detection bug, add coverage, tighten error handling
Fix: self_label was computed via _name(None, resolve) but edges already
resolve None→device_label, so the resolver could never rename the self
node. Use _name(device_label, resolve) instead.
Quality: replace assert on output_dir with graceful skip, validate
--samples requires --target, add _slug fallback for empty input, fix
Callable import (collections.abc).
Tests: 6 → 25 — adds three-way entropy, single-hop topology, median SNR,
link sorting, degree counting, resolver edge cases (returns None, renames
self), empty/mixed traces, multi-target graph, empty-graph render, output
dir creation, filename slug, SNR colour thresholds, Rich panel branches,
and the questionary validator.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 4.6
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