ci(ai): add AI PR-review workflow (ci-ai pilot) — skips cleanly without API key

.gitea/workflows/ai-review.yml

@@ -0,0 +1,32 @@
+# Feature A — KI-PR-Review + Summary (ci-ai pilot).
+# Läuft auf dem Pi-Runner (capacity 1, ~3-4 GB) -> Memory-Cap + schlankes
+# python-Image, keine JS-Actions. Ohne ANTHROPIC_API_KEY überspringt das Skript
+# den KI-Schritt sauber (Job bleibt grün). Aktivierung: Secret setzen + nach main.
+name: AI PR Review
+
+on:
+  workflow_dispatch: {}
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  review:
+    runs-on: eulernest
+    container:
+      image: python:3.12-slim
+      options: "--memory=512m --memory-swap=768m"
+    steps:
+      - name: Tooling (git)
+        run: apt-get update -qq && apt-get install -y -qq --no-install-recommends git ca-certificates
+
+      - name: ci-ai-Skripte holen
+        run: git clone --depth 1 https://git.eulernest.eu/user2595/ci-ai.git /opt/ci-ai
+
+      - name: KI-Review (überspringt sauber ohne Key)
+        env:
+          AI_PROVIDER: anthropic
+          AI_MODEL: claude-3-5-haiku-latest
+          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
+          GITEA_TOKEN: ${{ github.token }}
+          GITEA_API: https://git.eulernest.eu/api/v1
+        run: python /opt/ci-ai/scripts/ai_review.py