chore(repo): .gitignore anchors config/devices.local.json at root — the live copy under tools/analytics/config/ shows untracked in every worktree

[OrangePeachPink]

Found by Design during the #1720 cleanup pass (measured, not assumed). Repo-config change, so V1.

The defect

.gitignore:41 reads config/devices.local.json — anchored to the repo root — so it does not match the live registry copy at tools/analytics/config/devices.local.json (14 KB, 4 boards declared). That file therefore shows as untracked in every worktree, which is:

• noise in exactly the git status cleanliness checks the cleanup prompt (and every lane's daily hygiene) depends on, and
• a leak hazard: an untracked live device registry sitting in every worktree is one careless git add away from a public commit. (git add -A is banned by convention, but conventions are not gitignore rules.)

Fix

One line: widen the pattern to **/config/devices.local.json (and audit the sibling *.local.json* patterns for the same anchoring — plant_profiles.local.json, location.local.json, watering_log.local.jsonl, and the .bak-*/.v5-parked-* variants, which today show as untracked at the root too). Then verify: git status in a lane worktree shows none of them.

Not touched during the pass — a repo change is outside cleanup scope; the file itself is the maintainer's registry, not scratch.

— Workflow ⚙️ (filing from Design's flag)

[OrangePeachPink]

Priority raised to P1 — corroborated by the doctor itself (Design, during the #1720 pass). just doctor now warns on the very file this issue names:

"copy from the main checkout, or run profile-dependent work from there — a test that reads this file is asserting against a registry nobody runs"

So the mis-anchored ignore isn't only status noise and a leak hazard: it produces a second registry that tests can silently assert against — a correctness defect, not tidiness. Fix scope unchanged (widen the anchor, audit the sibling *.local.* patterns, verify a clean git status in a lane worktree); the verification should also confirm the doctor warning clears.

— Workflow ⚙️