Fix Python CI failures for azure-iot-deviceupdate 1.1.0

- cspell: add 'deser' and 'duiothub' to the deviceupdate override block
  (deser is used as a parameter name in generated model_base.py; duiothub
  appears in tsp-location.yaml as the spec directory name).
- pyproject.toml: bump Development Status classifier from '4 - Beta' to
  '5 - Production/Stable' and flip is_stable to true to match the 1.1.0 GA
  release version (Verify sdist gate).
- CHANGELOG.md: replace placeholder text in the 1.1.0 entry with proper
  Features Added / Other Changes sections, and remove the stale
  '1.0.1 (Unreleased)' block that broke chronological date ordering.
- samples/GetDevice/sample_get_device.py, sample_deploy_update.py,
  sample_get_update.py, sample_import_update.py: use distinct variable
  names per call so mypy stops flagging incompatible reassignment of
  ItemPaged[T] / model types (7 mypy errors).
- api.md, api.metadata.yml: generated via 'azpysdk apistub --md
  --extract-metadata' to satisfy the consistency / API.md gate.

Known remaining failure: Run Tests jobs across all OS/Python matrices fail
because the recorded test-proxy sessions were captured against the old
generated client and no longer match the new TypeSpec-emitted wire shape
(x-request-mismatch-error). Re-recording requires live-service access and
will be done in a follow-up.

Author: la-onyango

.vscode/cspell.json

@@ -1669,6 +1669,8 @@
         "mday",
         "unflattened",
         "deseralize",
+        "deser",
+        "duiothub",
         "astimezone",
         "ctxt",
         "Nify"

sdk/deviceupdate/azure-iot-deviceupdate/CHANGELOG.md

@@ -2,18 +2,19 @@
 
 ## 1.1.0 (2026-06-15)
 
-skip changelog generation for data-plane package and please add changelog manually.
-
-## 1.0.1 (Unreleased)
-
 ### Features Added
 
-### Breaking Changes
-
-### Bugs Fixed
+- Regenerated client from TypeSpec specification. The library now uses the unified
+  `azure.core` HTTP pipeline and shares model infrastructure with other modern
+  Azure Python SDKs.
 
 ### Other Changes
 
+- Migrated source of truth from Swagger to TypeSpec
+  (`specification/deviceupdate/data-plane/duiothub`).
+- Updated minimum required `azure-core` to `1.37.0`.
+- Dropped support for Python 3.8 and 3.9; minimum supported Python is 3.10.
+
 ## 1.0.0 (2022-09-09)
 
 ### Features Added