feat: vendor midstream and sublinear-time-solver libraries

Add ruvnet/midstream (AIMDS real-time inference) and
ruvnet/sublinear-time-solver (sublinear optimization algorithms)
as vendored dependencies under vendor/.

Co-Authored-By: claude-flow <ruv@ruv.net>

vendor/midstream/setup.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+echo "Setting up development environment..."
+
+# Install Rust if not present
+if ! command -v rustc &> /dev/null
+then
+    echo "Installing Rust..."
+    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+    source $HOME/.cargo/env
+fi
+
+# Install system dependencies
+echo "Installing system dependencies..."
+apt-get update && apt-get install -y \
+    build-essential \
+    pkg-config \
+    libssl-dev
+
+echo "Environment setup complete!"