governance + docs quick-wins batch (T-113)

- Amend D-66: floor lives at coverage_floor: in pubspec.yaml (single
  source of truth); coverage/floor.txt is no longer used; 95% target
  reached and is the current floor.
- Reconcile licenses.yaml with pubspec.yaml: drop the phantom lints
  5.0.0 entry (not a direct dep), bump test to 1.30.0 to match
  pubspec, tighten the purpose line.
- Triage Q-1/Q-2/Q-3/Q-25 with dated revisit notes: all still open,
  each pending a concrete trigger (T-99 for Q-1/Q-2, Tier-6 audit
  for Q-3, design call for Q-25).
- Drop --no-fatal-infos from ci/test.sh now that the import queue is
  clean.
- Add .claude/skills/README.md inventory.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -103,6 +103,10 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 - `make push-check-full` added — runs `push-check` plus integration +
   smoke for pre-release checks. Integration tests skip the hanging
   theme_picker case (T-116) until that's fixed (T-103).
+- Governance bookkeeping: D-66 amended (floor at `coverage_floor:` in
+  `pubspec.yaml`); `licenses.yaml` reconciled with `pubspec.yaml`;
+  Q-1/Q-2/Q-3/Q-25 triaged; `.claude/skills/README.md` inventory
+  added; `--no-fatal-infos` dropped from `ci/test.sh` (T-113).
 - Terminal panes now render bold attributes with a real bold weight —
   bundled JetBrainsMono Bold + BoldItalic are registered with the
   `JetBrainsMono` family at `weight: 700`. The painter's bold