feat: vendor midstream and sublinear-time-solver libraries (#109)

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

vendor/sublinear-time-solver/crates/neural-network-implementation/src/data/augmentation.rs

@@ -0,0 +1,29 @@
+//! Data augmentation for temporal neural networks
+
+use crate::{data::TimeSeriesData, error::Result};
+use serde::{Deserialize, Serialize};
+
+/// Configuration for data augmentation
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AugmentationConfig {
+    pub noise_std: f64,
+    pub time_warp_strength: f64,
+    pub magnitude_warp_strength: f64,
+}
+
+/// Data augmentor
+pub struct DataAugmentor {
+    config: AugmentationConfig,
+}
+
+impl DataAugmentor {
+    pub fn new(config: AugmentationConfig) -> Self {
+        Self { config }
+    }
+
+    pub fn augment(&self, _data: &TimeSeriesData) -> Result<TimeSeriesData> {
+        // Placeholder for data augmentation
+        // Would implement time warping, noise addition, etc.
+        todo!("Data augmentation not yet implemented")
+    }
+}