fix(config): add AYANEO Pocket S2 hidraw rumble source

[mydanyi]

The AYANEO Pocket S2 profile already matches its evdev controller, but it does not declare the controller's hidraw haptics interface. As a result, the input path is available while the InputPlumber haptics source is not attached for the device.

Add the existing upstream hidraw source format used by 50-ayaneo_pocket_ds.yaml, selecting the Pocket S2 interface with vendor 0x4001, product 0x0428, and interface 0. This is a six-line configuration-only change; controller targets and input mappings are unchanged.

This follows the device profile introduced by #627. It is separate from #729: that PR covers generic/driver rumble behavior, while this change adds the missing Pocket S2 source declaration so the existing haptics path can be discovered.

Validation:

• cargo test config::config_test::check_autostart_rules -- --exact --show-output in the project Docker image: passed (1 test).
• git diff --check: passed.
• The profile was compared with the existing AYANEO Pocket DS hidraw declaration.
• The equivalent source was tested on the Pocket S2 hardware; Steam's controller identification rumble worked after the source was attached.

AI disclosure: CodeBuddy DeepSeek V4.1 Flash drafted this YAML-only addition. Codex independently reviewed the upstream profiles, checked for overlapping upstream work, and ran the configuration test.

[pastaq]

Please just put Assisted-by: LLM in the commit message. We're not interested in advertising specific models.