[TrapsterDK]

Part of #6178.

Fixes found by running the consumer test on CI (linux_x86_64) for the first time:

• Root module of the nested consumer now carries the rules_py archive_override (non-root overrides are ignored), pinned from versions.bzl and MODULE.bazel.
• The copied preset bazelrc now points @rules_dx// flags at the renamed @acme_rules// repo.

CI evidence (evidence.yml, linux_x86_64, //svelte/tests/consumer:app_consumer_test):

• 41986321828: failed, rules_py not in BCR (fixed here)
• 41987413230: failed, @rules_dx//config:clippy_output_diagnostics not visible (fixed here)
• 41988645073: still failing, 3 CI rounds used. fmt and clippy tests pass. Not run locally (nested Bazel).

Remaining, seen in 41988645073:

1. svelte_build site_dist: Rolldown The "fileName" or "name" properties of emitted chunks and assets must be strings that are neither absolute nor relative paths, received "../../../../../../../../execroot/_main/bazel-out/k8-fastbuild/bin/index.html". The app sits in the consumer root package; the entry resolves through the sandbox symlink outside the root in svelte/rules/svelte_tool.mjs.
2. dx check/lint/format in the consumer: "Biome needs a config"; the consumer needs a biome.json plus biome_config aspect hint.
3. dx check generate: gazelle fails loading @rules_dx//gazelle/julia (no such attribute 'package_name' in 'julia_binary'), a rules_dx bug when consumed externally.

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https://claude.ai/code/session_011u9TXHDZrfmzFQ2WT8QAKK