Reconcile docs metadata and cockpit guidance

[cbusillo]

Summary

• clarify the docs index entry for artifact-inputs.toml as a runtime and publish source-input contract
• make workspace status docs name the generated cockpit files it checks
• correct manual cockpit guidance so workspace-cockpit.toml owns cockpit-root guidance while source repos own their code/docs
• add disable_odoo_online and odoo-docker to repo workflow metadata related repos after Decide Odoo tenant dependency lockfile policy #25 planning identified them as dependency-policy inputs

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 tests.test_scaffold
• uv run python -m unittest discover -s tests
• uv run platform --help
• uv build
• uv run platform workspace scaffold-cockpit-root --output-dir <tmp>/cockpit --force
• inspected generated cockpit docs/session-prompt.md
• uv run platform workspace sync --manifest /Users/cbusillo/Developer/odoo-tenant-cm/workspace.toml
• inspected generated CM workspace AGENTS.md, docs/README.md, and docs/session-prompt.md

Notes

This is the second narrow cleanup slice for #23. It keeps implementation behavior unchanged and does not attempt to close the broader cleanup issue.