Make bundle compatible with FrankenPHP worker mode

[HecFranco]

This pull request ensures EightPointsGuzzleBundle is safe to use in long-running PHP workers such as FrankenPHP worker mode (and similar runtimes where the Symfony container survives across HTTP requests).

Without proper service reset, singleton Guzzle clients and in-memory loggers can leak state between requests—leading to unbounded memory growth and unintended cookie sharing.

Q	A
Bug fix	yes
New feature	no
BC breaks	no
Deprecations	no
Tests pass	yes
Fixed tickets	—
License	MIT

Motivation

In FrankenPHP worker mode, the PHP process and the service container remain alive between requests. Symfony relies on services tagged with kernel.reset to clear request-scoped state.

Prior to this change:

• The in-memory Logger accumulated messages (including request/response bodies) and was only cleared during profiler collect().
• HttpDataCollector::reset() did not clear attached loggers, so kernel.reset without collect() left buffers intact.
• With options.cookies: true, Guzzle kept a CookieJar on the singleton client, allowing cookies to leak across unrelated Symfony requests.

Changes

Logging & profiler

• Logger and DevNullLogger implement Symfony\Contracts\Service\ResetInterface.
• Logger services are tagged with kernel.reset (method: reset).
• HttpDataCollector::reset() also clears attached loggers, covering the case where reset runs without collect().

Cookies

• When options.cookies: true, the extension injects a dedicated GuzzleHttp\Cookie\CookieJar service.
• That jar is tagged with kernel.reset (method: clear), so cookies are wiped between requests.

Documentation

• Added frankenphp-worker-mode.md.
• Linked from README.md and noted in UPGRADE.md (no BC break).

Backward compatibility

Fully backward compatible. No public API changes are required for consuming applications.

• Existing configurations continue to work as before.
• cookies: true remains supported and becomes worker-safe.
• Reset behavior is transparent under Symfony’s standard request lifecycle.

Testing

• Unit tests updated/added for Logger::reset, DevNullLogger::reset, collector reset without collect(), kernel.reset tags, and resettable cookie jars.
• Full PHPUnit suite: 158 tests, 481 assertions — all passing.
• CI matrix (PHP × Symfony) on this branch.
• Optional smoke test under FrankenPHP worker: enable logging, issue N requests, confirm stable memory and no cross-request cookie leakage.

Checklist for reviewers

• Confirm kernel.reset tags on logger and cookie jar definitions.
• Confirm no BC impact for apps that do not use workers.
• Confirm documentation accuracy for production recommendations (logging / profiling tied to %kernel.debug%).

[HecFranco]

Hi maintainers,
Thank you for your time and for maintaining this bundle.
This PR makes the bundle safe for long-running workers (e.g. FrankenPHP worker mode) by resetting in-memory log buffers and cookie jars between requests via kernel.reset. There are no BC breaks.
I would appreciate it if you could review and approve this MR when you have a moment.
Thanks again!

[gregurco]

@HecFranco thanks for the contribution 👏