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/scripts/benchmark_comparison.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+# Compare benchmark results between two git branches
+# Usage: ./benchmark_comparison.sh <baseline-branch> <feature-branch>
+
+set -e
+
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m'
+
+BASELINE_BRANCH="${1:-main}"
+FEATURE_BRANCH="${2:-$(git branch --show-current)}"
+
+echo "📊 Benchmark Comparison Tool"
+echo "============================"
+echo ""
+echo "Baseline: $BASELINE_BRANCH"
+echo "Feature:  $FEATURE_BRANCH"
+echo ""
+
+# Save current branch
+CURRENT_BRANCH=$(git branch --show-current)
+
+# Function to run benchmarks on a branch
+run_benchmarks_on_branch() {
+    local branch=$1
+    local baseline_name=$2
+
+    echo -e "${YELLOW}Checking out $branch...${NC}"
+    git checkout "$branch"
+
+    echo -e "${YELLOW}Building $branch...${NC}"
+    cargo build --release --all-features
+
+    echo -e "${YELLOW}Running benchmarks on $branch...${NC}"
+    cargo bench --all -- --save-baseline "$baseline_name"
+
+    echo -e "${GREEN}✓ Benchmarks for $branch completed${NC}"
+    echo ""
+}
+
+# Run benchmarks on baseline
+run_benchmarks_on_branch "$BASELINE_BRANCH" "baseline"
+
+# Run benchmarks on feature branch
+run_benchmarks_on_branch "$FEATURE_BRANCH" "feature"
+
+# Compare results
+echo -e "${YELLOW}Generating comparison...${NC}"
+
+# Return to original branch
+git checkout "$CURRENT_BRANCH"
+
+# Run comparison
+cargo bench --all -- --baseline baseline
+
+echo ""
+echo -e "${GREEN}Comparison complete!${NC}"
+echo ""
+echo "Results:"
+echo "  - Baseline: $BASELINE_BRANCH"
+echo "  - Feature:  $FEATURE_BRANCH"
+echo "  - Reports:  target/criterion/*/report/index.html"
+echo ""