fix(justfile): update demo-helios config to journals schema

[heyoub]

The demo-helios recipe writes the pre-scale-out workspace config schema (store_path directly under [workspaces.helios]), which the current config parser rejects:

error[config]: unknown field `store_path`, expected one of
`primary_journal`, `journals`, `docs_glob`, `extractor_cmd`, `semantics`

The BatPak scale-out work moved store_path into a per-journal block. This updates the recipe's heredoc to the current schema (matching what texo init generates): primary_journal = "canonical" + a [workspaces.helios.journals.canonical] block.

Scope / caveats

• 5-line change to one justfile recipe. Docs/tooling only, no source or behavior change.
• Clean fast-forward off main; no conflicts.
• Necessary but not sufficient to make demo-helios run end-to-end: the recipe now parses, but the confined LLM extractor still fails on hosts without the bvisor-linux-launcher (and the confinement denies the network the extractor needs). That confinement layer is slated for removal in the BatPak safe-Rust VM rewrite; this fix stands regardless.

Summary by CodeRabbit

• Configuration
  • Updated the generated Helios workspace configuration to designate the canonical journal explicitly.
  • Preserved documentation and extractor settings at the workspace level.
  • Organized the journal storage path under the canonical journal configuration.

Greptile Summary

This PR updates the demo-helios recipe to use the current journal-based configuration schema.

• Selects canonical as the primary journal.
• Moves the existing store path into the canonical journal table.
• Declares the journal role as canonical.

Confidence Score: 5/5

This looks safe to merge.

No blocking issues found in the changed code.

T-Rex Logs

What T-Rex did

• The team executed the general-contract-validation-proof to compare pre-change and post-change behavior for a path under workspaces.helios.
• The pre-change condition exited with code 1 due to an unknown field store_path.
• The post-change condition exited with code 0 and produced an empty journal, showing store resolution.
• The reproducible harness created store artifacts, including a .batpak.lock and 000001.fbat, demonstrating journal selection and store resolution.
• The harness asserted that the old parser error is absent from the after capture.

_{Ran code and verified through T-Rex}

Important Files Changed

Filename	Overview
justfile	Updates the Helios demo configuration to match the parser's journal schema; no issues found.

_{Reviews (1): Last reviewed commit: "fix(justfile): update demo-helios config..." | Re-trigger Greptile}

[coderabbitai]

📝 Walkthrough

Walkthrough

The demo-helios recipe now generates a workspace configuration with a canonical primary journal, workspace-level documentation and extractor settings, and journal-level storage configuration.

Changes

Helios configuration

Layer / File(s)	Summary
Canonical journal configuration justfile	The generated TOML adds primary_journal = "canonical", retains docs_glob and extractor_cmd at workspace scope, and moves store_path into the canonical journal table with role = "canonical".

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: updating the demo-helios justfile config to the journals schema.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/demo-helios-config-schema

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