Initial commit: FaceFusion REST API

FastAPI wrapper around FaceFusion v3.5.3 submodule with:
- Sync and async (job-based) processing endpoints
- FaceFusion bridge with manual key registration and Lock-serialized processing
- Multi-target Dockerfile (CPU + CUDA GPU)
- Docker Compose configs for dev, prod-cpu, and prod-gpu
- Gitea CI/CD workflow with dual image builds
- All 11 FaceFusion processors supported via options API

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.prod.yml

@@ -0,0 +1,24 @@
+services:
+  api:
+    image: dev.pivoine.art/valknar/facefusion-api:latest-cpu
+    ports:
+      - "8000:8000"
+    volumes:
+      - uploads:/data/uploads
+      - outputs:/data/outputs
+      - models:/data/models
+      - temp:/data/temp
+      - jobs:/data/jobs
+    environment:
+      - FF_EXECUTION_PROVIDERS=["cpu"]
+      - FF_EXECUTION_THREAD_COUNT=4
+      - FF_VIDEO_MEMORY_STRATEGY=moderate
+      - FF_LOG_LEVEL=info
+    restart: unless-stopped
+
+volumes:
+  uploads:
+  outputs:
+  models:
+  temp:
+  jobs: