Add serialize_in_event_loop=False for HA 2025.12.0+

[Copilot]

• Understand the issue: Add serialize_in_event_loop=False flag to HACSStore when running on HA 2025.12.0+
• Analyze existing codebase patterns for version-conditional arguments
• Modify custom_components/hacs/utils/store.py to conditionally add serialize_in_event_loop=False for HA 2025.12.0+
• Add parameterized test cases that properly test _SERIALIZE_IN_EVENT_LOOP_SUPPORTED with mocked HA versions
• Run linters and tests to verify changes
• Run code review and address feedback (fixed spelling of 'handlers')
• Run security scan (no vulnerabilities found)

Original prompt

https://developers.home-assistant.io/blog/2025/11/25/storage-helper-opt-in-serialize-in-executor/

HACSStore (custom_components/hacs/utils/store.py) should set the new serialize_in_event_loop flag to False, but it can only be used if it is running under HA core 2025.12.0 or later.

There are other places in the codebase you can use as a reference on how to handle conditional arguments based on the HA core version.

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[ludeeus]

@copilot Use parameterized tests that pass in 2 versions and a boolean value with the expected result.
Use unittest.patch to override the core version.

[Copilot]

Implemented parameterized test with 5 version/expected pairs and unittest.patch in 24ffd7f.

[ludeeus]

@copilot This is no longer checking _SERIALIZE_IN_EVENT_LOOP_SUPPORTED

[Copilot]

Fixed in 532fda9. The test now patches and verifies _SERIALIZE_IN_EVENT_LOOP_SUPPORTED directly.