feat: add MCP server for exposing compliance data to LLMs

New `compliance-mcp` crate providing a Model Context Protocol server
with 7 tools: list/get/summarize findings, list SBOM packages, SBOM
vulnerability report, list DAST findings, and DAST scan summary.
Supports stdio (local dev) and Streamable HTTP (deployment via MCP_PORT).
Includes Dockerfile, CI clippy check, and Coolify deploy job.

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

Dockerfile.mcp

@@ -0,0 +1,16 @@
+FROM rust:1.89-bookworm AS builder
+
+WORKDIR /app
+COPY . .
+RUN cargo build --release -p compliance-mcp
+
+FROM debian:bookworm-slim
+RUN apt-get update && apt-get install -y ca-certificates libssl3 && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/compliance-mcp /usr/local/bin/compliance-mcp
+
+EXPOSE 8090
+
+ENV MCP_PORT=8090
+
+ENTRYPOINT ["compliance-mcp"]