Marcel a0fa8f4d02 feat(journeyitem): add CRUD endpoints for JourneyItems on GeschichteController ...

Adds POST/PATCH/DELETE/PUT-reorder endpoints for journey items, backed by
JourneyItemService. Replaces jackson-databind-nullable (Jackson 2.x, incompatible
with Spring Boot 4 / Jackson 3.x) with Optional<String> three-way PATCH semantics:
null = absent/no-op, empty = clear, present = set.

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

2026-06-08 17:02:12 +02:00

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