feat(reports): occupancy curve, hour×dow heatmap, stay histogram, fraud KPIs

The dashboard had generic BI views but nothing parking-shaped. Added:

- Occupancy step-area over the range with the configured capacity as a
  red reference line. occupancyStart folds the ENTIRE prior ledger
  (voided entries excluded, clamped ≥0); each series point carries
  occupancyEnd. Answers "when are we near full".
- Entries heatmap hour × day-of-week (7×24, row 0 = Monday, site tz) as
  a pure CSS-grid intensity map — weekday-vs-weekend at a glance, the
  direct evidence for tariff windows. Replaces the flat hour histogram
  (strictly contains it).
- Stay-duration histogram at tariff-shaped edges (30m/1h/2h/4h/8h/24h/
  tail): where ladder/up-to breakpoints should sit.
- Voids + anomalies KPIs (accented when >0) — the look-closer counters
  the signed chain exists for; peak-occupancy KPI (peak / capacity).
- Revenue bars stacked cash vs card (the drawer's money vs the bank's);
  CSV export gains cash, card, occupancy_end columns.

Internals: localParts caches its Intl formatter per tz (was one new
formatter per ledger row); @parking/db re-exports lt/gt. 5 new tests.

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

packages/db/src/index.ts

@@ -5,7 +5,7 @@ import * as schema from "./schema.js";
 export * from "./schema.js";
 // Re-export the query helpers consumers need, so they don't depend on
 // drizzle-orm directly (it's an implementation detail of this package).
-export { eq, ne, and, or, asc, desc, gte, lte, isNull, isNotNull, inArray, sql } from "drizzle-orm";
+export { eq, ne, and, or, asc, desc, gt, gte, lt, lte, isNull, isNotNull, inArray, sql } from "drizzle-orm";
 
 /**
  * Open the local SQLite database in WAL mode. WAL allows many concurrent readers