ci-pipeline-cleanup Phase 1: extract 20 regression guards to scripts/ci-guards/

Bundle: ci-pipeline-cleanup, Phase 1.

Pure relocation — no behavior change. Each guard's bash logic is
byte-identical to the prior inline version; the only changes are:
(a) the guard becomes a sibling script under scripts/ci-guards/<id>.sh,
(b) ci.yml's per-guard step is replaced by a single loop step that
iterates all scripts.

20 scripts extracted (alphabetized):
  B-1-orphan-crud.sh, D-1-D-2-statusbadge-phantom.sh,
  G-1-jwt-auth-literal.sh, G-2-api-key-hash-json.sh,
  G-3-env-docs-drift.sh, H-001-bare-from.sh, H-009-readme-jwt.sh,
  L-001-insecure-skip-verify.sh, L-1-bulk-action-loop.sh,
  M-012-no-root-user.sh, P-1-documented-orphan-fns.sh,
  S-1-hardcoded-source-counts.sh, S-2-strings-contains-err.sh,
  T-1-frontend-page-coverage.sh, U-2-plaintext-healthcheck.sh,
  U-3-migration-mount.sh, bundle-8-L-015-target-blank-rel-noopener.sh,
  bundle-8-L-019-dangerously-set-inner-html.sh,
  bundle-8-M-009-bare-usemutation.sh, test-naming-convention.sh

Plus scripts/ci-guards/README.md documenting the contract:
- Each script must exit 0 on clean repo, non-zero with ::error::
  prefix on regression
- Runnable from repo root via 'bash scripts/ci-guards/<id>.sh'
- Adding a new guard: drop a new <id>.sh; CI auto-picks it up

ci.yml dropped 1488 → 557 lines (-931, -63%).

Single CI loop step now collects ALL guard failures before failing
the build instead of fail-fast — UX win for regressions that hit
two guards at once.

Two guards (QA-doc Part-count + seed-count, ci.yml lines 868-917)
deliberately NOT extracted — they move to 'make verify-docs' in
Phase 11 because they protect docs-the-operator-reads, not the
product itself.

Verification (sandbox):
- All 20 scripts pass against HEAD (chmod +x; for g in scripts/ci-guards/*.sh; do bash $g; done)
- New ci.yml YAML-parses cleanly
- Job boundaries preserved: go-build-and-test, frontend-build,
  helm-lint, deploy-vendor-e2e, deploy-vendor-e2e-windows
- Loop step appears twice (once at end of go-build-and-test, once
  at end of frontend-build) so both jobs continue running their
  set of guards

scripts/ci-guards/L-1-bulk-action-loop.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+# scripts/ci-guards/L-1-bulk-action-loop.sh
+#
+# L-1 master closed cat-l-fa0c1ac07ab5 (bulk-renew loop) and
+# cat-l-8a1fb258a38a (bulk-reassign loop) by adding server-side
+# bulk endpoints (POST /api/v1/certificates/bulk-renew and
+# POST /api/v1/certificates/bulk-reassign) that the GUI calls
+# in a single round-trip. Pre-L-1 the GUI looped per-cert
+# HTTP calls — 100 selected certs = 100 round-trips × ~50–200ms
+# each = a 5–20-second wedge during which the operator stares
+# at a progress bar.
+#
+# This script grep-fails the build if either loop shape reappears
+# in CertificatesPage.tsx. Patterns catch the actual pre-L-1
+# shapes:
+#   - `for (const id of ids) { await triggerRenewal(id) }`
+#   - `for (const id of ids) { await updateCertificate(id, { owner_id }) }`
+#   - `for (let i = 0; i < ids.length; i++) { await triggerRenewal(ids[i]) }`
+#
+# Allowed: comment lines explaining the pre-L-1 pattern in the
+# docblock above each handler. Test files (_test.tsx) exempt
+# so negative-pattern tests can keep working.
+#
+# See coverage-gap-audit-2026-04-24-v5/unified-audit.md
+# cat-l-fa0c1ac07ab5 and cat-l-8a1fb258a38a for closure
+# rationale, or web/src/api/client.ts::bulkRenewCertificates
+# / bulkReassignCertificates for the canonical call path.
+
+set -e
+
+BAD_LOOP=$(grep -nE 'for[[:space:]]*\(' web/src/pages/CertificatesPage.tsx 2>/dev/null \
+    | grep -E 'await[[:space:]]+(triggerRenewal|updateCertificate)\(' \
+    | grep -v '\.test\.' \
+    | grep -vE '^\s*[^:]+:[0-9]+:\s*//' \
+    || true)
+if [ -n "$BAD_LOOP" ]; then
+  echo "::error::L-1 regression: client-side bulk-action loop reappeared in CertificatesPage.tsx:"
+  echo "$BAD_LOOP"
+  echo ""
+  echo "Use bulkRenewCertificates({ certificate_ids: [...] }) or"
+  echo "bulkReassignCertificates({ certificate_ids: [...], owner_id, team_id? })"
+  echo "instead of looping per-item HTTP calls. See"
+  echo "coverage-gap-audit-2026-04-24-v5/unified-audit.md cat-l-* for rationale."
+  exit 1
+fi
+echo "L-1 bulk-action-loop: clean."