docs(CHANGELOG & ROADMAP): update for completed phases, added features, and integrations

- Documented new features: `AbteilungsRegelService`, `CompetitionWarningService`, `profile-feature`, `billing-feature`, and V2-Screens in CHANGELOG.
- Marked P1, P2, and P3 contexts as complete in ROADMAP, including MVP and integration phases.
- Added ZNS-Importer enhancements and frontend feature integrations to ROADMAP progress.
- Updated status of major project phases to reflect completion.

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

backend/services/masterdata/docs/ROADMAP.md

@@ -134,7 +134,8 @@
 1. [x] ADRs für Importer‑Einbettung, Rule‑Versionierung, API-Schichten abschließen (🏗️)
 2. [x] Exposed-Tabellen vervollständigen und in `SchemaUtils.create`/Migrationen registrieren (👷)
 3. [x] UseCases: Altersklasse, Lizenz‑Matrix, Abteilungs‑Regeln inkl. Unit‑Tests (👷🧐)
-4. [ ] ZNS‑Importer an Repositories anbinden, Idempotenz-Checks ergänzen, Mini‑ZNS Testlauf (👷🧐) *
+4. [x] ZNS‑Importer an Repositories anbinden, Idempotenz-Checks ergänzen, Mini‑ZNS Testlauf (👷🧐)
 5. [x] API v1 Endpunkte + OpenAPI, Contract‑Tests (👷🧐)
 6. [x] Observability-Grundlagen (Metriken + Dashboards) (🐧)
 7. [x] Curator: Docs aktualisieren, Runbooks und Changelogs pflegen (🧹)
+8. [x] Frontend-Feature "profile-feature" & "billing-feature" integriert (🎨)