feat: integrate new desktop shell and extend backend & ADRs

- Added `meldestelle-desktop` module using JVM/Compose Desktop, registered in `settings.gradle.kts`.
- Integrated new screens and desktop navigation into core: `Veranstaltungen`, `TurnierDetail`, etc.
- Expanded backend with `ExposedFunktionaerRepository` in `officials-infrastructure`.
- Completed ADRs for bounded context mapping (`ADR-0014`) and context map (`ADR-0015`).
- Updated and extended project documentation with session logs and architecture decisions.

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

settings.gradle.kts

@@ -69,9 +69,8 @@ include(":backend:infrastructure:security")
 // === BACKEND - SERVICES ===
 // --- ENTRIES (Nennungen) ---
 include(":backend:services:entries:entries-api")
-// entries-service: ON HOLD – pausiert bis Domain-Workshop (siehe MASTER_ROADMAP Phase 3)
-// Code liegt im Branch: feature/entries-service
-// include(":backend:services:entries:entries-service")
+include(":backend:services:entries:entries-domain")
+include(":backend:services:entries:entries-service")
 
 // --- CLUBS (Vereine) ---
 include(":backend:services:clubs:clubs-domain")
@@ -131,6 +130,7 @@ include(":frontend:features:nennung-feature")
 
 // --- SHELLS ---
 include(":frontend:shells:meldestelle-portal")
+include(":frontend:shells:meldestelle-desktop")
 
 // ==========================================================================
 // PLATFORM