Fix/supp ag fb (#1023)

* fix: prevent credit notes from entering payment flow

* fix: persist and display customer personal numbers

* feat: configure automatic invoice reminder days

* fix: issue credit notes through send flow

* chore: add repository agent guidance

* feat(mcp): route tools across user companies

* fix(articles): delete unused register entries

* feat(invoices): improve issued invoice actions

* feat(supplier-invoices): retain uploaded source documents

* docs: record implementation decisions

* feat: enhance customer personal number handling and validation

- Updated CustomerForm to allow personal numbers in the format of "********-1234" for individual customers.
- Added validation to ensure personal numbers are only accepted for individual customers in CreateCustomerSchema.
- Implemented masking and encryption for personal numbers to enhance data protection.
- Introduced new utility functions for masking and encrypting personal numbers.
- Added database migration to enforce unique constraints on credit note relationships and prevent duplicate entries.
- Enhanced error handling and logging for credit note issuance and invoice processing.
- Updated tests to cover new credit note creation guards and personal number handling.

* test: enhance list companies test with supabase query mocks

lib/extensions/_generated/sector-definitions.ts

@@ -23,7 +23,7 @@ export const EXTENSION_DEFINITIONS: Record<string, ExtensionDefinition[]> = {
           "icon": "Mail",
           "dataPattern": "core",
           "description": "Skicka fakturor och påminnelser via e-post",
-          "longDescription": "Aktiverar e-postfunktioner: skicka fakturor till kunder, automatiska betalningspåminnelser (15/30/45 dagar), och e-postmeddelanden. Kräver ett Resend-konto med verifierad domän.",
+          "longDescription": "Aktiverar e-postfunktioner: skicka fakturor till kunder, automatiska betalningspåminnelser enligt valt schema, och e-postmeddelanden. Kräver ett Resend-konto med verifierad domän.",
           "readsCoreTables": [
                 "invoices",
                 "customers",