docs(claude): update tool reference after Phase 3 rename (mod-fixture → e2e-fixtures)

Author: EnderOfWorlds007

CLAUDE.md

@@ -61,5 +61,5 @@ These are things that aren't self-evident from reading the code and have bitten
 - **Reports directory:** `e2e-reports/junit.xml` + `e2e-reports/dot-runs.log` (gitignored).
 - **Tag prefix:** `DOT_TAG=e2e-{ci|local}-{trigger}` so Sentry dashboards filter test traffic. The CLI plumbs `DOT_TAG` into the `cli.tag` root-span attribute via `src/telemetry-config.ts`.
 - **CI report job name:** `E2E Report` — aggregates per-leg conclusions, posts a sticky PR comment with marker `<!-- e2e-pr-report -->`, opens an auto-issue on schedule/release fail.
-- **Bootstrap:** see `tools/register-mod-fixture.ts` for the mod-test fixture; full bootstrap doc TBD in a later phase.
+- **Bootstrap:** see `tools/register-e2e-fixtures.ts` for the mod-test fixture; full bootstrap doc TBD in a later phase.
 - **Design spec:** `docs-internal/2026-05-02-e2e-test-suite-design.md`.