refactor(devices): rename driver "cashino" → "escpos" (generic ESC/POS)

The reachability-only clone driver carried its first unit's vendor name,
which read as misleading in the setup UI once other clones (ICS/Xprinter
XP-K200L, verified 2026-07-06: no /prn_stat.htm) used it. It was always
the generic ESC/POS driver — now named so:

- printer-cashino.ts → printer-generic.ts; GenericEscposPrinter;
  id "escpos", label "Generic ESC/POS 80mm printer (Cashino,
  ICS/Xprinter…)".
- Migration 0023 rewrites stored devices.driver_id rows.
- The registry keeps a PERMANENT cashino→escpos alias so restored
  pre-rename backups still resolve instead of "unknown driver".

Prose mentions of the Cashino as physical hardware stay — it's a real,
verified-fit printer; only the driver identity stopped being vendor-named.

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

packages/devices/src/index.ts

@@ -18,7 +18,7 @@ export {
   hikvisionDriver,
   dahuaDriver,
   rongtaDriver,
-  cashinoDriver,
+  escposDriver,
 } from "./drivers/index.js";
 export { isPrinter, type PrinterRole } from "./drivers/printer-rongta.js";
 // Albanian human date/time for printed slips (receipts, tickets, shift Z-report),