Hook coverage: extend verify-refs-guard.sh to outgoing/ and circulation drafts

[Yoojin-nam]

Scope

~/.claude/hooks/verify-refs-guard.sh currently triggers on:

• */submission/*/manuscript/*.docx
• */submission/*/manuscript/*.md
• */revision/R[0-9]*/*circulation*.docx

Senior-mentor reply drafts and pre-submission "outgoing" drafts skip the hook entirely. KKM/LHC/LWJ circulation packages have been observed to leave outgoing/ without a citation audit.

Proposed change

Add additional patterns, warn-only at first:

• */8_Review_Comments/*/outgoing/*.{docx,md}
• */outgoing/*.{docx,md} (project-level)
• */circulation/*.docx (already covered for revision/R*/, but generalize)

Enforce mode (MEDSCI_VERIFY_REFS_MODE=enforce) only when SSOT.yaml + qc/migration_complete both exist, identical to the existing Phase 1C gate. Keep MEDSCI_VERIFY_REFS_BYPASS=1 escape valve.

Why warn-only

Outgoing drafts may need rapid iteration; full network verification on every save would harm interactivity. Warn-only surfaces missing audits without blocking the writer, and the eventual enforce gate lands only after a project explicitly opts in.

Acceptance

• Pattern coverage updated with regression test under hook test directory (if exists)
• README/docs updated to list the new patterns
• Default mode for new patterns is warn-only

Related

• PR Add manage-refs pre-submission gate and align self-review reference QC #13 (manage-refs pre-submission gate) — this issue is the runtime-trigger counterpart to the explicit pre-submission gate