feat(03-registration-form-settings): editable form settings, additional info field, codebase map

Phase 3 complete (2 plans):

- 03-01: RegistrationFormSettings helper + admin Ustawienia formularza page; public form and server-side pricing driven by wp_setup/mf_parameters settings; SQL seed + PHP runner for production deployment
- 03-02: Dodatkowe informacje textarea field added to form/DB/confirmations/admin; admin Reg table reversed; codebase map written to .paul/codebase/ (8 docs)

Milestone v0.1 XXXV Konferencja Registration Update — complete.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.paul/ROADMAP.md

@@ -2,12 +2,13 @@
 
 ## Milestone v0.1: XXXV Konferencja Registration Update
 
-Status: In progress
+Status: ✅ Complete
+Completed: 2026-04-27
 
-Progress: 2 of 3 phases complete (67%)
+Progress: 3 of 3 phases complete (100%)
 
 ### Phase 1: Registration Form Update
-Status: Complete
+Status: ✅ Complete
 
 Goal: Align the public registration form, persisted participant data, confirmation email/summary, and administrator panel with the client-provided DOCX changes.
 
@@ -15,7 +16,7 @@ Planned:
 - `01-01`: Complete - updated registration fields, persistence, pricing/day options, admin display, and PHP migration runner.
 
 ### Phase 2: Registration Dictionary Phrases
-Status: Complete
+Status: ✅ Complete
 Completed: 2026-04-24
 Plan count: 1/1
 
@@ -25,10 +26,12 @@ Planned:
 - `02-01`: Complete - seeded dictionary phrases and updated registration templates to use translations.
 
 ### Phase 3: Registration Form Settings
-Status: Applying
+Status: ✅ Complete
+Completed: 2026-04-27
+Plan count: 2/2
 
 Goal: Add an administrator "Ustawienia formularza" page for editable registration participation days and all prices used by the public form, mail/summary output, and server-side price calculation. Also adds KSeF ID field to registration form and reverses admin Reg table order.
 
 Planned:
-- `03-01`: Applied, awaiting unify - created settings helper, admin page, deployment seed, and connected public form pricing/day options to editable settings.
-- `03-02`: Planning - add KSeF ID field to form/DB/confirmations/admin, reverse Reg table order.
+- `03-01`: Complete - created settings helper, admin page, deployment seed, and connected public form pricing/day options to editable settings.
+- `03-02`: Complete - added "Dodatkowe informacje" textarea field to form/DB/confirmations/admin; reversed admin Reg table order; codebase mapped.