build(docker): migrate full image from Debian to Alpine base

Replace node:24-bookworm-slim with node:24-alpine3.23 to reduce
image size and improve build efficiency.

Changes:
- Base image: node:24-bookworm-slim → node:24-alpine3.23
- Package manager: apt-get → apk
- Package names: python3-pip → py3-pip
- Remove python3-venv (included in Alpine Python3)
- Use apk --no-cache for cleaner image layers

Expected benefits:
- Reduce base image size by ~100-200MB (30-40% reduction)
- Faster image pulls and container startup
- Full MCP support maintained (Node.js, Python, uv)

Estimated final image size: ~600-700MB (vs ~800MB before)

Dockerfile.full

@@ -18,17 +18,15 @@ RUN make build
 # ============================================================
 # Stage 2: Node.js-based runtime with full MCP support
 # ============================================================
-FROM node:24-bookworm-slim
+FROM node:24-alpine3.23
 
 # Install runtime dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
+RUN apk add --no-cache \
   ca-certificates \
   curl \
   git \
   python3 \
-  python3-pip \
-  python3-venv \
-  && rm -rf /var/lib/apt/lists/*
+  py3-pip
 
 # Install uv and symlink to system path
 RUN curl -LsSf https://astral.sh/uv/install.sh | sh && \