Clean runtime docs and format drift

[cbusillo]

Summary

• normalize existing ruff format drift in runtime/artifact-adjacent modules and scaffold tests
• clarify that odoo-devkit still publishes artifact images for handoff while Launchplane owns remote ship/promote/gate/preview flows
• keep this as a small first cleanup slice for Cleanup pass: docs, dead code, dead files, and stale config #23, useful before future dependency-lockfile policy work in Decide Odoo tenant dependency lockfile policy #25

Refs #23

Verification

• uv run ruff check --diff .
• uv run ruff format --diff .
• uv run ruff check .
• uv run ruff format --check .
• uv run python -m unittest discover -s tests
• uv run platform --help
• uv build
• uv run platform workspace sync --manifest /Users/cbusillo/Developer/odoo-tenant-cm/workspace.toml
• inspected generated /Users/cbusillo/Developer/odoo-workspaces/cm/AGENTS.md
• inspected generated /Users/cbusillo/Developer/odoo-workspaces/cm/docs/README.md
• inspected generated /Users/cbusillo/Developer/odoo-workspaces/cm/docs/session-prompt.md

Notes

This does not close #23. It is the first narrow cleanup slice: format baseline plus a runtime/Launchplane ownership wording cleanup. Broader docs/dead-code/config inventory should remain follow-up work under #23.