Mike Bridge 3a9f863194 refactor(activity-view): SQL review tidies — mappings + perf-seed docstring ...

Two structural changes from the second SQLAlchemy review. No behaviour
change; full activity-view suite (70 unit + 30 integration) still
green.

* Tidy 1 (Warning #2): switch _batch_chart_counts and
  _batch_datasets_used_by_charts from positional row-unpack to
  .mappings()-keyed access. Column-rename-safe — a future edit that
  reorders columns in the SELECT can't silently misassign values
  during the Python loop. Matches the existing convention in
  _select_change_rows_for_kinds.

* Tidy 2 (Suggestion #1): docstring on _seed_activity_history
  explaining why it intentionally commits without rollback (unlike
  the T053 convention in activity_view_tests.py). The seed IS the
  setup, not the unit under test — the endpoint reads a realistic
  post-commit state of the shadow tables.

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

2026-05-28 15:37:25 -06:00

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