Changes before error encountered

Co-authored-by: Kenearos <86194771+Kenearos@users.noreply.github.com>

_bmad-output/implementation-artifacts/stories/1-3-datenbank-migrationen-mit-alembic.md

@@ -0,0 +1,73 @@
+# Story 1.3: Datenbank-Migrationen mit Alembic
+
+<!-- 🏃 Prepared by BMAD SM Skill — Agent: Bob (Scrum Master) -->
+<!-- Skill Command: /bmad-agent-bmm-sm → [CS] Context Story -->
+
+Status: done
+
+## Story
+
+Als **Backend-Entwickler**,
+möchte ich **Alembic-Migrationen für `blueprints` und `council_runs`**,
+so dass ich **das Datenbankschema versioniert verwalten kann**.
+
+## Acceptance Criteria
+
+1. `alembic upgrade head` erstellt Tabellen `blueprints` und `council_runs`
+2. `alembic current` zeigt die aktuelle Revision
+3. `blueprints`-Tabelle hat: `id` (UUID), `version` (Int), `name`, `nodes` (JSON), `edges` (JSON), `created_at`, `updated_at`
+4. `council_runs`-Tabelle hat: `id`, `blueprint_id` (nullable FK), `input_topic`, `status`, `final_draft`, `critic_score`, `iteration_count`, `created_at`, `completed_at`
+5. SQLAlchemy async ORM-Modelle existieren für beide Tabellen
+
+## Tasks / Subtasks
+
+- [x] Task 1: Alembic-Konfiguration initialisieren (AC: 1, 2)
+  - [x] Subtask 1.1: `alembic.ini` mit `script_location` konfigurieren
+  - [x] Subtask 1.2: `alembic/env.py` für async SQLAlchemy anpassen
+- [x] Task 2: Migration 001 — `blueprints`-Tabelle (AC: 3)
+- [x] Task 3: Migration 002 — `council_runs`-Tabelle (AC: 4)
+- [x] Task 4: SQLAlchemy ORM-Modelle (AC: 5)
+  - [x] Subtask 4.1: `models/blueprint.py`
+  - [x] Subtask 4.2: `models/council_run.py`
+- [x] Task 5: `database.py` mit async Engine und Session-Fabrik
+
+## Dev Notes
+
+- Async SQLAlchemy mit `asyncpg` für PostgreSQL, `aiosqlite` für Tests
+- `get_session()` als FastAPI-Dependency für Dependency Injection
+- In Tests: `AsyncEngine` mit In-Memory-SQLite, `create_all()` statt Alembic
+
+### Project Structure Notes
+
+- `backend/alembic/versions/001_create_blueprints_table.py`
+- `backend/alembic/versions/002_create_council_runs_table.py`
+- `backend/models/blueprint.py`
+- `backend/models/council_run.py`
+- `backend/database.py`
+
+### References
+
+- [Source: _bmad-output/planning-artifacts/architecture.md#Datenbankschema]
+- [Source: CLAUDE.md#Database — Alembic for migrations]
+
+## Dev Agent Record
+
+### Agent Model Used
+
+Amelia (💻 BMAD Dev Agent)
+
+### Completion Notes List
+
+- Alembic `env.py` wurde für async Engine (run_async_migrations) angepasst.
+- ORM-Modelle nutzen `String(36)` für UUIDs (portabel zwischen PostgreSQL und SQLite).
+
+### File List
+
+- `backend/alembic.ini`
+- `backend/alembic/env.py`
+- `backend/alembic/versions/001_create_blueprints_table.py`
+- `backend/alembic/versions/002_create_council_runs_table.py`
+- `backend/models/__init__.py`
+- `backend/models/blueprint.py`
+- `backend/models/council_run.py`
+- `backend/database.py`