Add shared engineering rule contracts
- go-logging: slog, server-side only, structured attributes
- go-database: MySQL cursor safety, soft delete, GORM tags, fail-fast, N+1 prevention
- go-background-tasks: Task Manager pattern, polling, no SSE
- go-code-style: layering, error wrapping, startup sequence, config, templating
- import-export: CSV Excel-compatible rules (BOM, semicolon, decimal comma, DD.MM.YYYY)
- table-management: filtering and pagination rules added
- CLAUDE.template.md: updated to reference all shared contracts
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Michael Chus
40d1c303bb