Add IPFS HLS streaming and GPU optimizations

- Add IPFSHLSOutput class that uploads segments to IPFS as they're created
- Update streaming task to use IPFS HLS output for distributed streaming
- Add /ipfs-stream endpoint to get IPFS playlist URL
- Update /stream endpoint to redirect to IPFS when available
- Add GPU persistence mode (STREAMING_GPU_PERSIST=1) to keep frames on GPU
- Add hardware video decoding (NVDEC) support for faster video processing
- Add GPU-accelerated primitive libraries: blending_gpu, color_ops_gpu, geometry_gpu
- Add streaming_gpu module with GPUFrame class for tracking CPU/GPU data location
- Add Dockerfile.gpu for building GPU-enabled worker image

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/templates/cache/detail.html

@@ -13,17 +13,32 @@
     <!-- Preview -->
     <div class="bg-gray-800 rounded-lg border border-gray-700 mb-6 overflow-hidden">
         {% if cache.mime_type and cache.mime_type.startswith('image/') %}
+        {% if cache.remote_only and cache.ipfs_cid %}
+        <img src="https://ipfs.io/ipfs/{{ cache.ipfs_cid }}" alt=""
+             class="w-full max-h-96 object-contain bg-gray-900">
+        {% else %}
         <img src="/cache/{{ cache.cid }}/raw" alt=""
              class="w-full max-h-96 object-contain bg-gray-900">
+        {% endif %}
 
         {% elif cache.mime_type and cache.mime_type.startswith('video/') %}
+        {% if cache.remote_only and cache.ipfs_cid %}
+        <video src="https://ipfs.io/ipfs/{{ cache.ipfs_cid }}" controls
+               class="w-full max-h-96 bg-gray-900">
+        </video>
+        {% else %}
         <video src="/cache/{{ cache.cid }}/raw" controls
                class="w-full max-h-96 bg-gray-900">
         </video>
+        {% endif %}
 
         {% elif cache.mime_type and cache.mime_type.startswith('audio/') %}
         <div class="p-8 bg-gray-900">
+            {% if cache.remote_only and cache.ipfs_cid %}
+            <audio src="https://ipfs.io/ipfs/{{ cache.ipfs_cid }}" controls class="w-full"></audio>
+            {% else %}
             <audio src="/cache/{{ cache.cid }}/raw" controls class="w-full"></audio>
+            {% endif %}
         </div>
 
         {% elif cache.mime_type == 'application/json' %}