[1.8] Complete orphaned e-invoice configs that have no generator

[nielsdrost7]

Context

The develop branch of the e-invoices repository contains several config files for e-invoice formats that have no corresponding generator. These configs are inert — they appear in no dropdown and produce no output. This issue tracks completing them so they are either connected to an existing generator or given a new one.

---

Orphaned configs inventory

Config file	Standard	Country	Missing
Ublxrechnungv30de.php	UBL XRechnung 3.0	Germany	Generator (connect to Ublv24 or new?)
Ublxrechnungv30vatde.php	UBL XRechnung 3.0 (VAT scheme)	Germany	Generator
Nlciusciiv10.php	NL CIUS CII 1.0	Netherlands	Generator
Ublsi20nl.php	Dutch SI 2.0 (UBL)	Netherlands	Generator
Ublsi20vatnl.php	Dutch SI 2.0 VAT variant	Netherlands	Generator
Ublciusv10ro.php	Romanian CIUS	Romania	Generator
Ublciusv21pt.php	Portuguese CIUS 2.1	Portugal	Generator
Zugferdv23basic.php	ZUGFeRD 2.3 Basic	Germany	Generator (reuse Facturxv10?)
Zugferdv23basicwl.php	ZUGFeRD 2.3 Basic WL	Germany	Generator
Zugferdv23extended.php	ZUGFeRD 2.3 Extended	Germany	Generator

Note: Zugferdv10.php + Zugferdv10Xml.php and Zugferdv23.php already work — only the v2.3 profile variants (Basic, Basic WL, Extended) are orphaned.

---

Resolution approach

Many of these can be resolved by adding 'generator' => 'ExistingGenerator' to the config rather than writing new generators:

Config	Likely generator
Ublxrechnungv30de.php	Ublv24 (see #16)
Ublxrechnungv30vatde.php	Ublv24
Ublsi20nl.php	Ublv24
Ublsi20vatnl.php	Ublv24
Ublciusv10ro.php	Ublv24
Ublciusv21pt.php	Ublv24
Zugferdv23basic.php	Facturxv10 (same CII namespace, different profile)
Zugferdv23basicwl.php	Facturxv10
Zugferdv23extended.php	Facturxv10
Nlciusciiv10.php	Facturxv10 (CII-based) or new generator

Before connecting a config to an existing generator, verify that the generator correctly handles any requirements specific to that config's CustomizationID (e.g. CIUS-specific schematron rules, country-specific tax handling).

---

Deliverables

For each orphaned config:

1. Confirm which generator to use (or decide a new one is needed)
2. Add the 'generator' key to the config
3. Generate sample output and validate it against the relevant schema or schematron
4. Add a basic AAA test (standard invoice + schema validation)

---

Acceptance criteria

• All 10 orphaned configs connected to a working generator
• Sample XML generated and schema-validated for each
• Each config appears in the correct country's e-invoicing version dropdown
• At minimum one AAA test per newly connected config (standard invoice → schema valid)
• ZUGFeRD v2.3 Basic / Basic WL / Extended profiles produce correct CustomizationID values per the ZUGFeRD 2.3 specification

---

Priority order

1. ZUGFeRD 2.3 profiles (Basic, Basic WL, Extended) — German market, high demand, Facturxv10 already works
2. UBL XRechnung (UBL variant of German B2G) — complement CII XRechnung from [1.8] Implement XRechnung 3.0 (standalone CII) XML template #17
3. Dutch SI 2.0 / NL CIUS — Netherlands B2G is mandatory; Ublv24 likely reusable
4. Romanian and Portuguese CIUS — lower urgency, Ublv24 likely reusable

---

Dependency

• [1.8] Implement Peppol BIS Billing 3.0 (UBL 2.1) XML template #16 must be completed first (or in parallel) — the Ublv24Xml.php generator must be audited and verified before the UBL-based orphaned configs are connected to it.