feat: initial nutri-api — Spring Boot REST API for supplement catalog

- Supplement and Ingredient entities with UUID primary keys
- CRUD REST API with pagination, filtering, and full-text search
- Liquibase migrations with PostgreSQL tsvector full-text index
- SpringDoc OpenAPI documentation
- RFC 7807 Problem Details error handling
- Unit tests for service, mapper, and controller layers (23 tests)
- Dockerfile (multi-stage) and docker-compose.yaml for local dev
- Application profiles: default, dev, prod

Dockerfile

@@ -0,0 +1,12 @@
+FROM eclipse-temurin:21-jdk-alpine AS build
+WORKDIR /app
+COPY pom.xml .
+COPY src ./src
+RUN apk add --no-cache maven && \
+    mvn clean package -DskipTests -q
+
+FROM eclipse-temurin:21-jre-alpine
+WORKDIR /app
+COPY --from=build /app/target/*.jar app.jar
+EXPOSE 8080
+ENTRYPOINT ["java", "-jar", "app.jar"]