ci: two fake gates that will go green when #691 is fixed, and no Elixir lint gate at all

[hyperpolymath]

Two jobs in CI assert nothing, and both are currently red for an unrelated reason (#691). When #691 is fixed they will turn green while testing nothing — converting a visible failure into invisible non-coverage. They should be fixed in the same change.

1. E2E Rust CLI Scan cannot fail

.github/workflows/tests.yml:95-96:

./target/release/hyper scan /tmp/test-repo 2>&1 || true
echo "PASS: Rust CLI scan completed"

|| true discards the scanner's exit code; the next line prints PASS unconditionally. (It also invokes hyper, while the binary is hypatia.)

2. The whole lint job in Docs & Code Quality

.github/workflows/quality.yml:318-342 — four steps, none of which can fail:

• :328 find … || true
• :333 grep -rn "TODO\|FIXME\|HACK\|XXX" … | head -20 || echo "None found"
• :337 find … || echo "No large files"
• :341 EditorConfig check → continue-on-error: true

Line :333 additionally greps --include="*.py" and --include="*.res" — languages with zero files in this repo.

Related: the Elixir side has no lint gate at all

mix compile --warnings-as-errors currently fails with 21 warnings (10 × @doc on a private function, ungrouped clauses in lib/vcl/client.ex:135 and lib/fleet_dispatcher.ex:35, an unused variable at lib/rules/admin_merge_eligibility.ex:363, rescue before catch, …). No workflow runs it. There is no Credo and no Dialyzer — not "configured but unwired", absent from mix.exs entirely.

So the largest component in the repo has zero static gating, while two shell jobs pretend to provide some.

Evidence: docs/DEBT-REGISTER.md (CI-5, CI-6, C-1, C-2).