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/install.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+echo "Installing Midstream application..."
+
+# Create project structure
+mkdir -p src/tests
+
+# Install hyprstream
+cargo add hyprstream
+
+# Install test dependencies
+cargo add --dev mockall tokio
+
+# Install dependencies and build project
+cargo build
+
+# Run tests
+cargo test
+
+echo "Installation complete!"