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>

app/schemas/system.py

@@ -0,0 +1,33 @@
+from typing import Any, Dict, List, Optional
+
+from pydantic import BaseModel
+
+
+class HealthResponse(BaseModel):
+    status: str = 'ok'
+
+
+class GpuDevice(BaseModel):
+    id: int
+    name: str
+    memory_total: Optional[int] = None
+    memory_used: Optional[int] = None
+
+
+class SystemInfoResponse(BaseModel):
+    execution_providers: List[str]
+    gpu_devices: List[GpuDevice]
+    cpu_count: Optional[int] = None
+    memory_total: Optional[int] = None
+    memory_available: Optional[int] = None
+
+
+class ProcessorInfo(BaseModel):
+    name: str
+    models: List[str]
+
+
+class ModelInfo(BaseModel):
+    name: str
+    path: str
+    size_bytes: int