[bdbarnett]

Three stale things found during a docs pass.

Generator target. `scripts/generate_sites.py` wrote the ecosystem map to `pydevices/docs/ecosystem.md`. That page now lives at `docs/how-it-works/ecosystem.md`. When a target is missing the generator prints `[SKIP] Ecosystem target missing` and carries on, so the idempotency check produced no diff and passed; the map in that repo had been drifting unchecked, and had been edited by hand to list `omnipython-lvgl`.

Pointing at the real page would have reverted that edit, because `data/repos_db.json` still described the four archived `lvgl-` repos. So the database now has an `omnipython-lvgl` entry (no generated page, not on the portal grid) and a new optional `ecosystem_map` key overrides `portal_grid` for the map only. The four `lvgl-` entries keep their portal cards and pages but leave the map. `profile/README.md` is regenerated; its only change is that the `omnipython-lvgl` blurb matches the flagship page's wording.

Review sample. `cold-eyes-review.yml` listed repos that are archived. Checked every entry with `gh repo view PyDevices/ --json isArchived`: archived were `palettes`, `pdwidgets`, `lvgl-bindings`, `lvgl-python`, `displayif`, `cmods`. All six are removed; the other ten are live.

Dead links in repos_db.json. Checked all 86 distinct URLs (fragments stripped): every non-GitHub-path URL and repo URL returns 200 with `curl -L`, and all 23 `blob/` and `tree/` paths resolve on the repo's main via `gh api repos/PyDevices//contents/` (404 on a known-bad path confirms the check can fail). The two `lvgl-bindings` install-page anchors match headings that exist. No link needed repointing.

Checked

• Ran the generator in a scratch workspace (this branch plus fresh clones of PyDevices.github.io, pydevices, gallery, mip): `[OK] Ecosystem map -> pydevices/docs/how-it-works/ecosystem.md`, and `git status` is clean in all four clones, so the idempotency check will pass. Before adding the database entry the same run showed the page losing its Tier 3 section.
• `python3 -m unittest discover -s tests`: 82 tests OK. `ruff check scripts`: passed.