Paper A v13: filled submission draft (rev7) + reproducible build bundle

Fill all 18 placeholders in the condensed v13 submission draft with
data verified against the analysis DB and LOCKED canonical scripts;
close 12/13 co-author review items (only #8b protocol first-run open).

Key changes (need co-author sign-off; see handoff doc):
- Firm A out-of-sample HC 0.01% -> 0.42% (buggy 0.0001 from Script 49
  same-pair bug, propagated v4.2->v13; never reuse 0.0001)
- §III-D empty cell ~=0 -> 7,681 honest reframe (not degenerate crops)
- low cosine cut 0.837 -> 0.8547 primary (BCD 2013-2019 closed-world,
  held-out discipline; 0.8489 confirmed = BCD all-period); HC/MC/HSC
  unchanged, UN/LH move <=0.4pp

Adds Figures 1-5 (real-data plots + schematics), full references,
Appendix A/B, UN/HSC ICCR, n-reconciliation, #13 MOPS-metadata
survival verification, "參" set-level feasibility probe (negative).
Two codex (gpt-5.5) adversarial rounds applied; no fabrication found.

Bundle: paper/v13_build/ (markdown source, harvest/figure scripts,
figures) for reproducibility. Handoff note for co-author included.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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