fix: hide API-archived customers and suppliers from lists and pickers (#1927)

* fix: hide API-archived customers and suppliers from lists and pickers

The v1 API soft-archives customers and suppliers (archived_at, plus
is_active=false on suppliers) and its own list routes hide those rows
behind ?include_archived=true. No other surface filtered archived_at, so
an archived counterparty stayed a normal row in the dashboard rosters,
the internal /api/customers and /api/suppliers list routes, the MCP list
tools and every customer/supplier picker.

Apply the same canonical `archived_at IS NULL` filter on every non-v1
list and picker path:

- /api/customers GET, /api/suppliers GET (feeds the customers page and
  the supplier-invoice form)
- suppliers dashboard page (reads suppliers via browser Supabase)
- InvoiceEditor and NewRecurringScheduleDialog customer pickers; an
  invoice or schedule being edited keeps its current customer visible
  (archiving does not refuse on drafts, so a draft can point at one)
- deadlines page and CalendarWorkspace customer pickers
- InvoicePreviewCard sample customer
- gnubok_list_customers and gnubok_list_suppliers: hidden by default,
  optional include_archived boolean mirroring the v1 flag; rows now
  carry archived_at so an agent can tell them apart when opted in

Detail routes and by-id lookups are untouched: an archived row still
opens. The delete-vs-archive semantics are unchanged.

The tools/list payload guard moves 60.7K to 60.8K: main had ~6 tokens
of headroom, so even the bare boolean contract crossed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* test(schema): raise the unresolvable-expression ceiling by 2 for the archived-customer picker filters

The two .or('archived_at.is.null,id.eq.<uuid>') filters keep an edited
draft's archived customer selectable. The uuid is a runtime value, so the
scanner cannot resolve the expression; both columns exist and the filter is
covered by the archived-counterparty tests.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

tests/schema/no-phantom-columns.test.ts

@@ -98,6 +98,13 @@ const KNOWN_STALE_ON_CONFLICT: Record<string, string> = {}
  * parent/legacy links). Writing the shapes as inline literals would need one
  * variant per key combination; the row shapes are covered by ingest.test.ts.
  *
+ * 2026-08-26 +2: the customer pickers in InvoiceEditor and
+ * NewRecurringScheduleDialog hide archived customers but must keep the one the
+ * draft already points at, which is a PostgREST logical filter
+ * `.or('archived_at.is.null,id.eq.<uuid>')`. The id is a runtime value, so the
+ * expression cannot be a literal; both columns are real and the filter is
+ * covered by the archived-counterparty tests.
+ *
  * 2026-08-17 +1: lib/import/skattekonto-file/import-service.ts inserts parsed
  * statement rows via a mapped batch (same shape as every other file importer);
  * the row shape is covered by the execute route tests and the pg-real suite.
@@ -107,7 +114,7 @@ const KNOWN_STALE_ON_CONFLICT: Record<string, string> = {}
  * routed / unrouted / converted / failed, all partial); the column set is
  * pinned by peppol-inbound.test.ts and the pg-real immutability test.
  */
-const UNRESOLVED_CEILING = 380
+const UNRESOLVED_CEILING = 382
 
 /**
  * Floor on statically resolved column references. Guards the guard: if a change