chore: repo-wide bloat sweep, remove dead code and fold duplicate helpers (#2150)

* chore: repo-wide bloat sweep, remove dead code and fold duplicate helpers

Remove 33 dead files, ~270 unreferenced exports/types, 13 dead i18n
namespaces and 4 unused dependencies; fold byte-identical helper copies
into one canonical home each (lib/utils chunk/sleep/utcDateStamp,
lib/dates/iso, lib/invariants/uuid, lib/xml/escape, lib/reports/sru/format,
lib/pdf/number-text, lib/browser/panel-request, lib/api/v1/body +
v1ValidationError rolled out to ~55 v1 routes, booking-template schemas).

No behaviour change: v1 bodies and status codes, MCP tool schemas, DB
writes and money math are untouched. Naive ore rounding was deliberately
not swapped for roundOre; see DECISIONS.md 2026-09-02 for the full list
of things left alone on purpose.

tsc, lint, 19588 unit tests and check:guards green; antipattern baseline
ratcheted (naive-ore-round 622 -> 620, hand-rolled-invariant 115 -> 113).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* test(transactions): import RawTransaction from @/types after the ingest re-export removal

CI's type ratchet (check:types, full tsconfig) caught the one test file
that still imported the type through lib/transactions/ingest.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

lib/auth/api-keys.ts

@@ -25,7 +25,7 @@ export {
   TOOL_SCOPE_MAP,
   TOOL_COUNT_BY_SCOPE,
 } from './scope-catalog'
-export type { ApiKeyScope, ScopeGroup } from './scope-catalog'
+export type { ApiKeyScope } from './scope-catalog'
 import { API_KEY_SCOPES, DEFAULT_SCOPES, type ApiKeyScope } from './scope-catalog'
 
 export function validateScopes(scopes: unknown): ApiKeyScope[] | null {

lib/auth/turnstile.ts

@@ -8,8 +8,6 @@
  * fail open as "disabled" rather than render a broken widget.
  */
 
-export const TURNSTILE_SITE_KEY_ENV = 'NEXT_PUBLIC_TURNSTILE_SITE_KEY'
-
 const UNCONFIGURED_SITE_KEYS = new Set([
   '',
   '__NEXT_PUBLIC_TURNSTILE_SITE_KEY__',