review(2-7): story 2-7 passes all ACs — mark done, epic-2 complete

All 10 review criteria pass with no code changes required. 99 tests
pass, ruff clean. Added 4 deferred items (WaveshareDisplay stub, HAT
crash-on-boot, dumb fixed sleep, startup text position). Epic-2
marked done as all 7 stories are now in done state.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_bmad-output/implementation-artifacts/sprint-status.yaml

@@ -35,7 +35,7 @@
 # - Dev moves story to 'review', then runs code-review (fresh context, different LLM recommended)
 
 generated: 2026-04-22
-last_updated: 2026-04-22  # 2-1 done, 2-2 done, 2-3 done, 2-4 done, 2-5 done, 2-6 done, 2-7 review, epic-2 in-progress
+last_updated: 2026-04-22  # 2-1 done, 2-2 done, 2-3 done, 2-4 done, 2-5 done, 2-6 done, 2-7 done, epic-2 done
 project: planeMapper
 project_key: NOKEY
 tracking_system: file-system
@@ -52,14 +52,14 @@ development_status:
   epic-1-retrospective: optional
 
   # Epic 2: Live Radar Display
-  epic-2: in-progress
+  epic-2: done
   2-1-aircraft-data-model-and-fetcher: done
   2-2-coordinate-projection-and-base-map-loading: done
   2-3-home-marker-and-airspace-outlines: done
   2-4-altitude-colour-bands-and-aircraft-type-icons: done
   2-5-per-aircraft-drawing: done
   2-6-stateful-renderer-and-display-interface: done
-  2-7-operational-radar-loop-startup-screen-and-systemd-wiring: review
+  2-7-operational-radar-loop-startup-screen-and-systemd-wiring: done
   epic-2-retrospective: optional
 
   # Epic 3: Stale Data Resilience