workflow-fix: v4 Results scan truncates at any mid-body --- rule (masked hard cap FAILs)

Overview / Motivation

Auto-filed from a formal workflow-fix candidate raised by the clean-result-critic on task #825 (fold base-separator-control r1). Confidence: HIGH.

Goal

Fix _v4_results_body in scripts/verify_task_body.py so a horizontal rule between results cannot truncate the checks-20/21 scan: cut the Results text at the absolute line index from _v4_footer_start_line(body) (mapped into the Results slice) instead of string-matching the footer's first line, or anchor on the **Repro:** label line and strip only the immediately-preceding ---/blanks.

Workflow gap

• Bug observed: _v4_results_body truncates the ## Results scan at the first line string-equal to the footer's FIRST line; when the footer starts with a --- rule (the standard v4 shape), any earlier --- between results truncates every later result out of checks 20 (word caps) and 21 (three-beat) — on #825 this masked two ≥180-word per-result HARD FAILs and excluded 2 of 16 results from the three-beat scan while the verifier reported OVERALL PASS.
• Why it is a workflow gap: a horizontal rule between results is legal markdown the spec nowhere forbids, and the verifier is the AUTHORITATIVE cap gate — a first-occurrence string match on a one-character-class boundary line silently defeats two mechanical checks on any body that uses it.
• Confidence (emitter): high

Proposed change (candidate diff sketch — refine in planning)

in _v4_results_body():
-    footer_first_line = footer.splitlines()[0] ...
-    for i, line in enumerate(rlines):
-        if line.strip() == footer_first_line.strip():
+    start = _v4_footer_start_line(body)          # absolute body line index
+    # map `start` to the Results slice offset (Results is the last H2,
+    # so results lines are a suffix of body lines) and cut there,
+    # then strip the trailing `---`/blank lines above the footer.
regression test: a v4 body with a `---` between two results, the second ≥180 words -> check 20 FAILs.

Scope / surfaces

• Primary target: scripts/verify_task_body.py (_v4_results_body, ~line 2634)
• Regression test in tests/test_verify_task_body.py.

Provenance

• workflow_fix_target: scripts/verify_task_body.py
• fingerprint: 5670e0be382d

(Verbatim candidate block preserved in the emitting critic's epm:clean-result-critique v11 marker on task #825.)