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/hyprstream-main/examples/client/python/README.md

@@ -0,0 +1,68 @@
+# Hyprstream Python Client
+
+A Python client library for interacting with the Hyprstream metrics service. This client provides a high-level interface for storing and querying metrics using Apache Arrow Flight SQL.
+
+## Installation
+
+```bash
+# Using poetry (recommended)
+poetry install
+
+# Using pip
+pip install .
+```
+
+## Quick Start
+
+```python
+from hyprstream_client import MetricsClient, MetricRecord
+
+# Connect to Hyprstream server
+with MetricsClient("grpc://localhost:50051") as client:
+    # Insert a single metric
+    metric = MetricRecord(
+        metric_id="test_metric_1",
+        timestamp=None,  # Will use current time
+        value_running_window_sum=10.0,
+        value_running_window_avg=2.0,
+        value_running_window_count=5
+    )
+    client.set_metric(metric)
+    
+    # Query metrics from the last hour
+    df = client.get_metrics_window(window_seconds=3600)
+    print(df)
+```
+
+## Features
+
+- ✅ Native Arrow Flight SQL integration
+- ✅ Efficient batch operations
+- ✅ Type-safe metric records
+- ✅ Prepared statement caching
+- ✅ Flexible query filtering
+- ✅ Time window support
+
+## Development
+
+```bash
+# Install development dependencies
+poetry install --with dev
+
+# Run tests
+poetry run pytest
+
+# Format code
+poetry run black .
+poetry run isort .
+
+# Type checking
+poetry run mypy .
+
+# Linting
+poetry run ruff .
+```
+
+## License
+
+This project is licensed under the same terms as the main Hyprstream project.