## 38) History archive query paths may need explicit indexing plan
- Where found:
	- [backend/app/db.py](backend/app/db.py)
	- [backend/app/repositories/history_archive_repo.py](backend/app/repositories/history_archive_repo.py)
- Why this is needed:
	- Large archive datasets can degrade filter/sort performance.
- Goal:
	- Add indexes aligned with real query patterns.
- What to do:
	- Benchmark common history queries.
	- Add migration with targeted indexes.
- Possible traps and issues:
	- Extra indexes increase write cost and DB size.
- Docs changes needed:
	- Add DB performance/indexing section for history.
- Doc references:
	- [Docs/Backend-Development.md](Docs/Backend-Development.md)
	- https://www.sqlite.org/queryplanner.html

---

## 39) No explicit DI container strategy for backend service graph
- Where found:
	- [backend/app/dependencies.py](backend/app/dependencies.py)
	- [backend/app/services](backend/app/services)
- Why this is needed:
	- Dependency construction and lifecycle are partly implicit.
- Goal:
	- Define a clear dependency wiring pattern for services and repositories.
- What to do:
	- Create service composition root pattern and document usage.
- Possible traps and issues:
	- Over-engineering if container abstraction is too heavy for current size.
- Docs changes needed:
	- Add dependency wiring chapter.
- Doc references:
	- [Docs/Architekture.md](Docs/Architekture.md)

---

## 40) Frontend and backend observability are not aligned
- Where found:
	- [backend/app/main.py](backend/app/main.py)
	- [frontend/src](frontend/src)
- Why this is needed:
	- Backend uses structured logging while frontend error telemetry is mostly local and ad-hoc.
- Goal:
	- Define unified error telemetry and correlation approach.
- What to do:
	- Introduce frontend error reporting pipeline and request correlation IDs.
- Possible traps and issues:
	- PII/sensitive payload leakage risk in client-side telemetry.
- Docs changes needed:
	- Add observability and privacy-safe logging guidelines.
- Doc references:
	- [Docs/Architekture.md](Docs/Architekture.md)
	- [Docs/Web-Development.md](Docs/Web-Development.md)