fix(migrations): re-issue the invoice payee migrations skipping migration-reset source companies (#2260)

* fix(migrations): re-issue the invoice payee migrations skipping migration-reset source companies

#2233 merged, but its first migration (20260903150000) failed on prod at
the backfill's INSERT into invoice_payee_defaults:

  ERROR: Archived migration reset source records are immutable (P0001)

The insert fires the SECURITY DEFINER mirror into company_settings, and
one of the companies with a legacy payment map is a migration-reset
source, whose rows are immutable by trigger. The migration rolled back as
a whole, prod has neither table nor column, and every migration merged
after it is queued behind the failure.

Same fix as #2249 used for the country backfill: both entry branches of
the backfill now skip companies present in company_migration_resets, and
both files are re-issued under fresh versions (20260904010000 and
20260904011000) so Supabase applies them in order after everything that
landed today. The failed versions never applied on prod, so no orphan;
staging applied them by hand and its schema_migrations rows must be
renamed to match (see DECISIONS.md).

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

* fix(migrations): make the re-issued payee migrations rerunnable

pg-upgrade builds from main, where the first issue (20260903150000)
already ran, then applies the re-issued file on top: the composite UNIQUE
constraint already existed. Every statement in both files is now guarded
(constraint DO blocks, CREATE TABLE/INDEX IF NOT EXISTS, DROP POLICY /
DROP TRIGGER IF EXISTS before each CREATE), so staging and the preview
branches that applied the first issue take the re-issue cleanly too, and
prod, which never applied it, is unaffected.

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

---------

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

lib/api/schemas.ts

@@ -635,7 +635,7 @@ const CreateInvoiceBaseSchema = z.object({
     .optional(),
   received_date: optionalIsoDate,
   // Which of the company's bank accounts the invoice asks the customer to pay
-  // to (migration 20260903193000). Omitted/null = the per-currency default.
+  // to (migration 20260904011000). Omitted/null = the per-currency default.
   // The route checks the account belongs to the company, is flagged as a
   // payee and is usable for the invoice currency.
   payment_cash_account_id: z
@@ -2221,7 +2221,7 @@ const InvoicePaymentAccountSchema = z.object({
 
 /**
  * PATCH /api/cash-accounts/[id]: the verifikationsserie override plus the
- * payee fields (migration 20260903150000). Payee keys share the field rules
+ * payee fields (migration 20260904010000). Payee keys share the field rules
  * of InvoicePaymentAccountSchema so the settings form, the legacy settings
  * writers and this route agree on what a valid bankgiro is.
  */