VSN-2437/ perf : use light mappers for inspection and report list endpoints

Before :

• The paginated list endpoints (GET /inspections and GET /reports/filtered-reports) were generating hundreds of sequential SQL queries before responding

After :

• Added mapToLightResponseDto: scalar-only mapper that skips relation loading
  (sections, field answers, files, presigned URLs).
• getAllInspectionsWithPagination and getFilteredInspections now use this light mapper → 1 SQL query per page instead of N×M.
• Added toResponseLight: ModelMapper mapping without Hibernate.initialize on the associated inspection's sections/subsections/fieldAnswers.
• toResponsePage now uses toResponseLight for paginated list responses.