Align with Azure Samples dataflow graphs patterns (Marcel feedback)

- Add [build] target in .cargo/config.toml (avoids --target flag on every build)
- Add configuration key-value pairs to DataflowGraph YAML showing how
  runtime config reaches modules (temperature_lower_bound/upper_bound)
- Link to azure-edge-extensions-aio-dataflow-graphs samples repo
- Patterns verified against Marcel Bindseil's ISE samples

Signed-off-by: John Lian <[email protected]>

Author: jlian

articles/iot-operations/develop-edge-apps/howto-develop-wasm-modules.md

@@ -73,8 +73,14 @@ Create `.cargo/config.toml` to configure the SDK registry:
 ```toml
 [registries]
 aio-wg = { index = "sparse+https://pkgs.dev.azure.com/azure-iot-sdks/iot-operations/_packaging/preview/Cargo/index/" }
+
+[build]
+target = "wasm32-wasip2"
 ```
 
+> [!TIP]
+> Adding `[build] target = "wasm32-wasip2"` to your `.cargo/config.toml` means you don't need to pass `--target wasm32-wasip2` on every `cargo build` command. The [Azure Samples dataflow graphs repository](https://github.com/Azure-Samples/azure-edge-extensions-aio-dataflow-graphs) uses this pattern.
+
 Edit `Cargo.toml`:
 
 ```toml
@@ -298,6 +304,11 @@ spec:
       graphSettings:
         registryEndpointRef: my-registry-endpoint
         artifact: graph-simple:1.0.0
+        configuration:
+          - key: temperature_lower_bound
+            value: "-40"
+          - key: temperature_upper_bound
+            value: "3422"
     - nodeType: Destination
       name: mqtt-destination
       destinationSettings:
@@ -1019,3 +1030,4 @@ For integration testing, deploy your module to a development cluster and use MQT
 - [Build WASM modules with VS Code extension](howto-build-wasm-modules-vscode.md) for IDE-based development
 - [Run ONNX inference in WASM](./howto-wasm-onnx-inference.md) for ML model integration
 - [Azure IoT Operations WASM samples](https://github.com/Azure-Samples/explore-iot-operations/tree/main/samples/wasm) on GitHub
+- [Data flow graph samples with schema validation and WIT composition](https://github.com/Azure-Samples/azure-edge-extensions-aio-dataflow-graphs) on GitHub