docs: add post-audit status report for M5 sweep

Author: hyperpolymath

docs/reports/audit/audit-2026-04-15-post.md

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+# Post-audit Status Report: dotmatrix-fileprinter
+- **Date:** 2026-04-15
+- **Status:** Complete (M5 Sweep)
+- **Repo:** /var/mnt/eclipse/repos/dotmatrix-fileprinter
+
+## Actions Taken
+1. Standard CI/Workflow Sweep: Added blocker workflows (`ts-blocker.yml`, `npm-bun-blocker.yml`) and updated `Justfile`.
+2. SCM-to-A2ML Migration: Staged and committed deletions of legacy `.scm` files.
+3. Lockfile Sweep: Generated and tracked missing lockfiles where manifests were present.
+4. Static Analysis: Verified with `panic-attack assail`.
+
+## Findings Summary
+- 3 unsafe get calls in src/proven/Proven_SafeHex.res
+- 1 unsafe get calls in src/proven/Proven_SafeString.res
+- DOM manipulation (innerHTML/document.write) in src/main.js
+- 1 unsafe get calls in lib/ocaml/Proven_SafeString.res
+- 3 unsafe get calls in lib/ocaml/Proven_SafeHex.res
+- 14 TODO/FIXME/HACK markers in contractiles/k9/template-hunt.k9.ncl
+- flake.nix declares inputs without narHash, rev pinning, or sibling flake.lock — dependency revision is unpinned in flake.nix
+- 1 import map entry/ies in deno.json without a version pin — specifiers are not reproducibly resolved
+- Rust project has test infrastructure but no mutation-test configuration (cargo-mutants/.cargo-mutants.toml) — add `cargo mutants` to verify test suite kills mutations
+
+## Final Grade
+- **CRG Grade:** D (Promoted from E/X) - CI and lockfiles are in place.