lib/ruling.sh gains the mechanical half of #50 D12-D15: the comment body
rides the fetch as base64 (rows stay line-oriented), ruling_shape_decision
checks the four line-anchored bold-tolerant field labels,
ruling_deadline_decision derives the rung from the labeled epoch,
ruling_default_decision parses the Default: line for wording only, and
reconcile_ruling wires them with bare-stops-here exclusion — every write a
comment, one per marker per episode, both surfaces via the shared lib.
Part of #73.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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