ci(installer): enforce greenfield case coverage

docs/reports/verification/1050-c1-fix-round/documentation-checklist.md

@@ -2,7 +2,7 @@
 
 ## Required artifacts
 
-- [x] `docs/PRD.md` exists; #1050 C1 requirement 13 now binds the complete in-scope remote stack source chain and requires a per-path denominator.
+- [x] `docs/PRD.md` exists; #1050 C1 requirement 13 binds the complete in-scope remote stack source chain, and requirement 15 binds pipeline-level exact case-set execution coverage.
 - [x] User guide: not applicable; no user-facing production installer behavior changed.
 - [x] Admin guide: not applicable; no operator procedure or deployment behavior changed.
 - [x] Developer guide: existing `docs/guides/installer-state-machine.md` defines the fail-closed installer model; the C1-specific remote-arm contract and evidence live in the PRD, scratchpad, and scoped verification report.
@@ -20,4 +20,5 @@
 - [x] Verification documentation is in the same logical change set as the shell-test remediation.
 - [x] Trust boundary states both halves: the digest proves fetched bytes remain identical through execution/verify-after; it does not authenticate authorship against provider/TLS compromise. Independent provenance is the inherited PRD v2 §3 deferral.
 - [x] Round-3 Codex code review APPROVE (confidence 0.92, zero findings) and security re-review risk NONE (confidence 0.96, zero findings). The initial HIGH trust-root finding remains documented as the canonical signed-provenance deferral, not hidden.
+- [x] Round-4 review cycle closed: two blocking Codex findings (missing dependency ordering; production manifest comments misparsed) were accepted and fixed. Final code review APPROVE (confidence 0.94, zero findings) and security risk NONE (confidence 0.96, zero findings).
 - [x] Canonical evidence remains in-repo. No external publishing action was requested or performed.