feat: add CLIP embedding service sidecar for GPU machine

FastAPI service that loads ViT-L-14 model and exposes /embed,
/similarity, and /batch-similarity endpoints. Runs on RTX 3090
with NVIDIA GPU reservation. Includes 9 cosine similarity tests.

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

clip-service/Dockerfile

@@ -0,0 +1,15 @@
+FROM pytorch/pytorch:2.5.1-cuda12.4-cudnn9-runtime
+
+RUN apt-get update && apt-get install -y --no-install-recommends curl \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY app/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app/ .
+
+EXPOSE 5200
+
+CMD ["python", "-u", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "5200"]