feat(skatteverket): expose skattekonto row booking via MCP staged operations (#2039)

* feat(skatteverket): expose skattekonto row booking via MCP staged operations

Skattekonto READ and RECONCILE were already MCP tools, but BOOKING rows
existed only behind the cookie-session extension routes. This closes the
flow on API-key surfaces:

- New staged MCP write tools gnubok_book_skattekonto_row and
  gnubok_book_skattekonto_rows (batch, 1-200 ids), catalogVisibility
  'search', STAGED_OPERATION_SCHEMA, stage-time bookability gates and
  rule-matched counter-account preview. Staging never books.
- New pending-operation types book_skattekonto_row / book_skattekonto_rows
  (CHECK constraint migration pair, risk tier medium, sv/en labels).
- Commit executor reaches the skatteverket extension through the
  registry-resolved services channel (core never imports @/extensions):
  new commitBookSkattekontoRows service wraps the SAME
  bokforSkattekontoTransactionsBatch helper the HTTP bokfor-batch route
  uses (draft + commit per row via the bookkeeping engine, requireSettled),
  with the approving user id passed explicitly (auth.uid() is NULL on the
  service client).

No booking math or account mapping changed: auth-surface exposure only.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018zGah8Yy49esAwpnKGxiGy

* chore(migrations): move book_skattekonto constraint pair after main's newest version

origin/main gained 20260830101500 while this branch was in flight; keep
the new pending_operations constraint migrations sorted after it so they
apply in order.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018zGah8Yy49esAwpnKGxiGy

* fix(skatteverket): resolve CI and review findings for skattekonto booking tools

- Inline the skattekonto_transactions select strings at both stage-time
  call sites so the no-phantom-columns scanner can resolve them (the
  shared const pushed the unresolvable-expression count past the
  ceiling and failed Unit tests 3/4).
- Return a fixed public message from the commitBookSkattekontoRows
  batch-level catch instead of the raw exception text; the raw error
  stays in the server log (Superagent P2).
- Add verifikat_description to the staged previews so the reviewer sees
  the exact ledger text the booking helper writes, Skatteverket motpart
  included (Swedish accounting review).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018zGah8Yy49esAwpnKGxiGy

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/pending-operations/vocabulary.ts

@@ -52,6 +52,9 @@ export const OPERATION_LABEL_KEYS: Record<string, string> = {
   match_batch_allocate: 'type_match_batch_allocate',
   bulk_book_transactions: 'type_bulk_book_transactions',
   bulk_book_inbox_items: 'type_bulk_book_inbox_items',
+  // Skattekonto row booking
+  book_skattekonto_row: 'type_book_skattekonto_row',
+  book_skattekonto_rows: 'type_book_skattekonto_rows',
   // Periods, year-end, depreciation
   close_period: 'type_close_period',
   lock_period: 'type_lock_period',