## Overview

PR 7 of the SDK-60 async epic: the async FDv1 polling data source and
feature requester.

- **`async_polling.py`** — async FDv1 polling update processor. Polls
the feature requester on an interval and pushes flag/segment data into
the data source update sink, updating data source status (VALID / OFF)
as appropriate.
- **`async_feature_requester.py`** — async FDv1 feature requester that
fetches the full flag/segment payload over HTTP.
- **`test_async_polling.py`** — unit tests for the async polling update
processor.

## Stacking

This PR is **stacked on #464** (base branch
`jb/sdk-2743/async-fdv1-streaming`), which provides the shared
`datasource_common` module these files import. Until #464 merges, this
PR will also show #464's commits in its diff; a rebase after #464 merges
will drop them, leaving only the three files here.

SDK-2825

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> New experimental async flag-ingestion path affects client
initialization and data-source status; shutdown and HTTP error handling
must stay correct to avoid leaks or stuck waits.
> 
> **Overview**
> Adds **experimental** async FDv1 polling: an `AsyncFeatureRequester`
contract plus `AsyncFeatureRequesterImpl` that GETs the poll endpoint
with gzip, optional payload filter query param, and **ETag / 304**
caching before returning flags and segments.
> 
> **`AsyncPollingUpdateProcessor`** runs polls on `AsyncRepeatingTask`,
writes via `sink_or_store`, sets **ready** when the store initializes,
and reports **VALID / INTERRUPTED / OFF** on success, recoverable
errors, and fatal HTTP failures (matching sync polling semantics,
including unblocking init on unrecoverable errors).
> 
> **`AsyncRepeatingTask.wait_stopped()`** lets shutdown wait for the
in-flight poll to finish; **`stop()`** on the processor uses that (with
**`requester.close()` in `finally`**) so transports are not closed
mid-request.
> 
> Broad unit tests cover caching, transport ownership, error recovery,
sink status, and shutdown ordering.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
305f2b0. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

🤖 I have created a release *beep* *boop*
---


##
[9.17.0](9.16.1...9.17.0)
(2026-08-28)


### Features

* Add async big segment store manager and async Redis adapter
([#462](#462))
([aa492d2](aa492d2))
* Add async DynamoDB persistent feature store
([#490](#490))
([cb010df](cb010df))
* Add async event processor
([ec7c113](ec7c113))
* Add async event processor
([#472](#472))
([ec7c113](ec7c113))
* Add async FDv1 polling data source and feature requester
([#475](#475))
([cca37a8](cca37a8))
* Add async FDv1 streaming and data source status tracking
([#464](#464))
([4bf7067](4bf7067))
* Add async FDv2 data sources
([#485](#485))
([5da1515](5da1515))
* Add async FDv2 data system
([#486](#486))
([6a70132](6a70132))
* Add async hook, plugin, and flag tracker
([#463](#463))
([686a70a](686a70a))
* Add async migration support
([#470](#470))
([577d51e](577d51e))
* Add async persistent feature store foundation and Redis adapter
([f9c76ee](f9c76ee))
* Add AsyncConfig for the async SDK client
([#471](#471))
([0587a78](0587a78))
* Add AsyncLDClient with FDv1 data system and public API
([#480](#480))
([fd041a5](fd041a5))
* Add Config.with_wrapper_information
([#501](#501))
([8a98583](8a98583))
* Add environment ID support for hooks.
([#484](#484))
([49e809f](49e809f))
* Add read-only store views and async persistence foundation for the
data system
([#503](#503))
([0eb61fa](0eb61fa))


### Bug Fixes

* Allow tombstones without a key property
([#502](#502))
([5f44e61](5f44e61))
* Escape attribute names reported in redactedAttributes
([#505](#505))
([90059cb](90059cb))
* Prevent a persistent-store outage from throwing in the sync FDv2
evaluation
([#506](#506))
([467da53](467da53))
* Return empty prerequisites for a flag that fails to evaluate in
all_flags_state
([#483](#483))
([73e9b07](73e9b07))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Overview**
> **Release Please** bumps the package from **9.16.1** to **9.17.0** in
`pyproject.toml`, `ldclient/version.py`,
`.release-please-manifest.json`, and the provenance example in
`PROVENANCE.md`.
> 
> `CHANGELOG.md` gains a new **9.17.0** (2026-08-28) section that
records what ships in this minor release: a broad **async** surface
(`AsyncLDClient`, `AsyncConfig`, async FDv1/FDv2 data systems, event
processor, hooks/plugins, migration, and Redis/DynamoDB persistent
stores plus big-segment async support), plus sync improvements
(`Config.with_wrapper_information`, hook environment ID, read-only store
views) and bug fixes (tombstones, `redactedAttributes` escaping, FDv2
persistent-store resilience, `all_flags_state` prerequisites).
> 
> No application logic changes appear in this diff—only version metadata
and release notes.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
f225e46. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>