MINIFICPP-2892 Tensor extensions based on sonos/tract

CONTROLLERS.md

@@ -31,6 +31,7 @@ limitations under the License.
 - [RocksDbStateStorage](#RocksDbStateStorage)
 - [SmbConnectionControllerService](#SmbConnectionControllerService)
 - [SSLContextService](#SSLContextService)
+- [TractModelService](#TractModelService)
 - [UpdatePolicyControllerService](#UpdatePolicyControllerService)
 - [VolatileMapStateStorage](#VolatileMapStateStorage)
 - [XMLReader](#XMLReader)
@@ -324,6 +325,22 @@ In the list below, the names of required properties appear in bold. Any other pr
 | Use System Cert Store      | false                 | true<br/>false                                                                                                                                           | Whether to use the certificates in the OS's certificate store                                                                            |
 
 
+## TractModelService
+
+### Description
+
+Provides a shared, CPU-optimized neural network for inference. Supports ONNX (`.onnx`) and NNEF (directory or tarball) models; the format can be auto-detected from the file extension or set explicitly.
+
+### Properties
+
+In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the NiFi Expression Language.
+
+| Name                | Default Value | Allowable Values       | Description                                                                                                                                                                                                                                                                                                                                                 |
+|---------------------|---------------|------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| **Model File Path** |               |                        | Absolute path to the model on the edge device. For ONNX this is a `.onnx` file; for NNEF this is a `.nnef.tgz` archive, a `.nnef` tarball, or the root directory of an unpacked NNEF model. The model is loaded, parsed, and compiled for the host CPU once when the controller service is enabled; subsequent inference calls reuse the compiled runnable. |
+| **Model format**    | Auto          | Auto<br/>Onnx<br/>Nnef | Format of the file/directory referenced by 'Model File Path'. 'Auto' picks Onnx when the path ends in `.onnx` and Nnef when it ends in `.nnef`, `.nnef.tgz`, `.nnef.tar`, `.nnef.tar.gz`, or points at a directory. Set explicitly when the path uses a non-standard extension.                                                                             |
+
+
 ## UpdatePolicyControllerService
 
 ### Description
@@ -393,4 +410,3 @@ In the list below, the names of required properties appear in bold. Any other pr
 | **Pretty Print XML**        | false         | true<br/>false                                                        | Specifies whether or not the XML should be pretty printed                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
 | **Name of Record Tag**      |               |                                                                       | Specifies the name of the XML record tag wrapping the record fields.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | **Name of Root Tag**        |               |                                                                       | Specifies the name of the XML root tag wrapping the record set.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
-