MOD: Rename dataset_id and channel_id fields pt2

    - Rename fields for Rust structs
    - Ran `cargo fmt`
    - Update tests

Author: cjdsellers

notebooks/quickstart.ipynb

@@ -620,7 +620,7 @@
     {
      "data": {
       "text/plain": [
-       "dtype([('nwords', 'u1'), ('type', 'u1'), ('dataset_id', '<u2'), ('product_id', '<u4'), ('ts_event', '<u8'), ('order_id', '<u8'), ('price', '<i8'), ('size', '<u4'), ('flags', 'i1'), ('chan_id', 'u1'), ('action', 'S1'), ('side', 'S1'), ('ts_recv', '<u8'), ('ts_in_delta', '<i4'), ('sequence', '<u4')])"
+       "dtype([('nwords', 'u1'), ('type', 'u1'), ('dataset_id', '<u2'), ('product_id', '<u4'), ('ts_event', '<u8'), ('order_id', '<u8'), ('price', '<i8'), ('size', '<u4'), ('flags', 'i1'), ('channel_id', 'u1'), ('action', 'S1'), ('side', 'S1'), ('ts_recv', '<u8'), ('ts_in_delta', '<i4'), ('sequence', '<u4')])"
       ]
      },
      "execution_count": 32,
@@ -1251,7 +1251,7 @@
        "       (14, 32, 1, 5482, 1609099225061045683, 647570749727, 321025000000000,  1, 0, 0, b'B', b'A', 1609099225250461359, 92701, 1098),\n",
        "       (14, 32, 1, 5482, 1609099225061045683, 647570749776, 320925000000000,  1, 0, 0, b'B', b'A', 1609099225250461359, 92701, 1098),\n",
        "       (14, 32, 1, 5482, 1609099225061045683, 647570749868, 320825000000000,  1, 0, 0, b'B', b'A', 1609099225250461359, 92701, 1098)],\n",
-       "      dtype=[('nwords', 'u1'), ('type', 'u1'), ('dataset_id', '<u2'), ('product_id', '<u4'), ('ts_event', '<u8'), ('order_id', '<u8'), ('price', '<i8'), ('size', '<u4'), ('flags', 'i1'), ('chan_id', 'u1'), ('action', 'S1'), ('side', 'S1'), ('ts_recv', '<u8'), ('ts_in_delta', '<i4'), ('sequence', '<u4')])"
+       "      dtype=[('nwords', 'u1'), ('type', 'u1'), ('dataset_id', '<u2'), ('product_id', '<u4'), ('ts_event', '<u8'), ('order_id', '<u8'), ('price', '<i8'), ('size', '<u4'), ('flags', 'i1'), ('channel_id', 'u1'), ('action', 'S1'), ('side', 'S1'), ('ts_recv', '<u8'), ('ts_in_delta', '<i4'), ('sequence', '<u4')])"
       ]
      },
      "execution_count": 31,