CI: Add py_decl verify step to catch binary overflows.

.github/workflows/micropython.yml

@@ -81,6 +81,13 @@ jobs:
         source $BUILD_TOOLS
         micropython_clone
 
+    - name: "Py_Decl: Checkout py_decl"
+      uses: actions/checkout@v4
+      with:
+        repository: gadgetoid/py_decl
+        ref: v0.0.1
+        path: py_decl
+
     - name: Build MPY Cross
       run: |
         source $BUILD_TOOLS
@@ -111,6 +118,11 @@ jobs:
         source $BUILD_TOOLS
         cmake_build
 
+    - name: "Py_Decl: Verify UF2"
+      shell: bash
+      run: |
+        python3 py_decl/py_decl.py --to-json --verify build-${{ matrix.name }}/${{ env.RELEASE_FILE }}.uf2
+
     - name: Store .uf2 as artifact
       uses: actions/upload-artifact@v4
       with: