[Java] Implement effective pagination for GET /v1/lamps

[davideme]

Summary

• wire cursor and pageSize through Java GET /v1/lamps
• return bounded pages with correct hasMore and nextCursor
• align in-memory paged reads with DB semantics (active-only and deterministic ordering)
• add controller/service/repository tests for pagination behavior

Notes

• invalid cursor now falls back to first page (offset 0)
• terminal pages omit nextCursor

Closes #374

[Copilot]

Pull request overview

This PR implements effective pagination for the Java GET /v1/lamps endpoint, ensuring list responses are bounded and cursor/pageSize parameters are properly honored. The implementation aligns with the parent issue #372's goal of optimizing API performance by preventing unbounded responses.

Changes:

• Added offset-based cursor pagination with configurable page size (default 25)
• Implemented deterministic ordering (by createdAt, then by id) for consistent pagination
• Ensured in-memory repository behavior matches database semantics (active-only filtering and stable sort order)
• Added comprehensive test coverage for pagination scenarios including edge cases

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/java/src/main/java/org/openapitools/controller/LampsController.java	Updated listLamps endpoint to parse cursor parameter, call paginated service method, and build response with hasMore/nextCursor fields
src/java/src/main/java/org/openapitools/service/LampService.java	Added PagedLampsResult record and findAllActivePage method with OffsetBasedPageRequest implementation for cursor-based pagination
src/java/src/main/java/org/openapitools/repository/impl/InMemoryLampRepository.java	Updated findAll(Pageable) to filter deleted lamps and sort by createdAt+id for consistency with JPA implementation
src/java/src/test/java/org/openapitools/controller/LampsControllerTest.java	Added tests for paginated responses, terminal pages, and invalid cursor handling
src/java/src/test/java/org/openapitools/service/LampServiceTest.java	Added tests for hasMore/nextCursor logic, terminal pages, and pageSize validation
src/java/src/test/java/org/openapitools/repository/LampRepositoryTest.java	Added tests for active-only filtering and deterministic ordering in paginated queries

[davideme]

Checked all PR feedback surfaces (issue comments, review comments, and review threads). There are currently no actionable comments to address on this PR.\n\nI already pushed follow-up fixes for SpotBugs and PMD in commits f13b72b and 2618780.