SIMD Refactor: Merge simd-dev into dev (#55)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: aider (openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>
Co-authored-by: Warp <agent@warp.dev>

lib/feeds/csv/CsvFeed.md

@@ -0,0 +1,72 @@
+# CsvFeed Class
+
+`CsvFeed` is a file-based feed implementation that loads historical OHLCV data from CSV files. It supports both streaming access (simulating real-time playback) and batch retrieval.
+
+## Key Features
+
+* **Historical Data Loading**: Reads standard OHLCV CSV files.
+* **Chronological Ordering**: Automatically reverses data if needed (assumes newest-first in file, provides oldest-first).
+* **Streaming Interface**: Implements `IFeed` for consistent usage with other feed types.
+* **Batch Retrieval**: Supports fetching specific time ranges via `Fetch()`.
+
+## CSV Format Requirements
+
+The file must have a header row and follow this column order:
+`timestamp, open, high, low, close, volume`
+
+* **Timestamp**: `YYYY-MM-DD` (assumed UTC midnight)
+* **Prices/Volume**: Numeric values
+
+Example:
+
+```csv
+Date,Open,High,Low,Close,Volume
+2024-01-01,100.0,105.0,99.0,102.5,10000
+2024-01-02,102.5,103.0,101.0,101.5,8500
+```
+
+## Class Definition
+
+```csharp
+public class CsvFeed : IFeed
+{
+    public CsvFeed(string filePath);
+    public TBar Next(bool isNew = true);
+    public TBarSeries Fetch(int count, long startTime, TimeSpan interval);
+}
+```
+
+## Usage
+
+### 1. Loading Data
+
+```csharp
+var feed = new CsvFeed("path/to/data.csv");
+```
+
+### 2. Streaming Data (Simulation)
+
+```csharp
+// Get first bar
+var bar = feed.Next(isNew: true);
+
+// Loop through all data
+while (true)
+{
+    // Process bar...
+    Console.WriteLine(bar);
+
+    // Get next bar
+    bool isNew = true;
+    bar = feed.Next(ref isNew);
+
+    // Stop if no more new data
+    if (!isNew) break;
+}
+```
+
+### 3. Fetching a Batch
+
+```csharp
+long startTime = new DateTime(2024, 1, 1).Ticks;
+var batch = feed.Fetch(10, startTime, TimeSpan.FromDays(1));