Added detailed sections to `AGENTS.md`:
- "Repo Snapshot (verified)" to describe the .NET 8 solution structure and current implementation state.
- "High-value Commands" with instructions for building and running the solution.
- "Architecture That Matters During Edits" to outline dependency direction, key libraries, and response contract.
- "Current Implementation Gaps (easy to miss)" to highlight incomplete implementations and areas needing verification.
- "Config/Security Gotcha" to warn about sensitive data in `appsettings.json`.
Updated `README.md`:
- Added "Wichtiger Hinweis zu DB-Spaltennamen" to explain DB column mapping practices and emphasize the need for final verification of stored procedure result sets.
- Clarified that DB field names are mapped only in the Infrastructure layer, not in Domain models.
