Phase 6b/7b: per-child decoded periods, separate brief blocks, idempotent calendar (AUD-119)

- Parse each child's own "Today" day widget for the timetable (FR-16); drop the
  school-wide week calendar's lesson grid and clean the leaked routine rows.
- Add the editable codes map (FR-17): subjects, rooms, teachers and period
  labels, seeded, an unknown code falls back to the raw code; `school codes` CLI.
- Brief: Finn's block first, then Harry's, four sections always present (FR-9);
  periods decoded into plain English; the undated tail is one counted line (FR-18).
- Calendar: write periods + work due + work overdue + major events, per child,
  on every pass. Identity is the stable per-item key, so a re-run never re-inserts
  (FR-8). morning-brief.sh now runs scan -> calendar push -> notify.
- Day-widget labels are 12-hour: 1-6 read as PM, fixing afternoon periods.

Proven live on .13: image 0.6.2-phase6b7b; both children's briefs decoded and
separate; 35 events in calendar.school; runs 2 and 3 of the scan added nothing.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

scripts/calendar-push.sh

@@ -13,7 +13,7 @@
 #   scripts/calendar-push.sh events [--days 14]
 #
 # Environment overrides:
-#   IMAGE                image tag                  (default 0.5.0-phase7)
+#   IMAGE                image tag                  (default 0.6.2-phase6b7b)
 #   VOLUME               SQLite volume             (default compass-teams-nhs_compass-teams-nhs-data)
 #   ENV_FILE             HA config source           (default environment.d/school-service.env)
 #   SCHOOL_TIMEZONE      family timezone            (default Australia/Sydney)
@@ -25,7 +25,7 @@ set -euo pipefail
 
 REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 
-IMAGE="${IMAGE:-compass-teams-nhs/school:0.5.0-phase7}"
+IMAGE="${IMAGE:-compass-teams-nhs/school:0.6.2-phase6b7b}"
 VOLUME="${VOLUME:-compass-teams-nhs_compass-teams-nhs-data}"
 ENV_FILE="${ENV_FILE:-$REPO_ROOT/environment.d/school-service.env}"
 SCHOOL_TIMEZONE="${SCHOOL_TIMEZONE:-Australia/Sydney}"