fix: add timeout and fallback for lock_info probe

[bdraco]

Summary

• Add 5s timeout around the lock_info() GATT reads to prevent indefinite hangs
• Handle individual BleakError per characteristic so partial reads return partial results
• Read model characteristic first since it drives battery workaround and door sense logic
• Fall back to default LockInfo in _update() when the entire probe fails, breaking the infinite reconnect-probe-disconnect loop
• Use BLE address as fallback serial number to prevent Home Assistant from grouping unrelated devices together

Problem

lock_info() reads 4 Device Information Service characteristics (read_gatt_char) with no timeout. When the lock drops the BLE connection during these reads (e.g. ATT error 19), read_gatt_char hangs until the remote disconnects (~30s). Since _lock_info is required before any _update() can proceed, every update cycle reconnects and retries the probe, creating an infinite loop that makes the lock completely unresponsive.

Test plan

• test_lock_info_success — all reads succeed
• test_lock_info_partial_failure — one read fails, others succeed with partial results
• test_lock_info_all_reads_fail — all reads fail, returns all defaults
• test_lock_info_timeout — reads hang, 5s timeout fires
• test_lock_info_reads_model_first — model is read before other characteristics
• test_update_continues_when_lock_info_probe_fails — TimeoutError fallback with MAC as serial
• test_update_continues_when_lock_info_probe_bleak_error — BleakError fallback with MAC as serial
• Verified on live system: lock falls back to defaults and continues operating

[Copilot]

Pull request overview

This PR hardens the BLE lock_info() probe and the PushLock._update() flow so update cycles can continue even when device-information GATT reads hang or fail, avoiding repeated reconnect/probe loops.

Changes:

• Add a timeout + per-characteristic error handling in Lock.lock_info() and read the model characteristic first.
• Add _probe_lock_info() in PushLock to fall back to a default LockInfo when probing fails, allowing _update() to proceed.
• Add unit tests covering success, partial failure, total failure, timeout behavior, model-first ordering, and _update() fallback behavior.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
src/yalexs_ble/lock.py	Adds LOCK_INFO_TIMEOUT and updates lock_info() to read model first, apply a timeout, and tolerate per-read BleakErrors.
src/yalexs_ble/push.py	Adds _probe_lock_info() and uses it from _update() to avoid update failures when probing lock info fails.
tests/test_lock.py	Adds coverage for lock_info() success/partial failure/all-fail/timeout and verifies characteristic read order.
tests/test_push.py	Adds coverage to ensure _update() continues when lock_info() raises TimeoutError or BleakError.

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