Add timeout behavior E2E tests for device-profiler

[groupsky]

Description

Add E2E test coverage for device-profiler timeout configuration and behavior.

Context

PR #366 adds device-profiler E2E tests but doesn't cover the --timeout parameter or timeout error scenarios. The profiler supports configurable response timeouts (default 1000ms), but timeout behavior is only covered in unit tests.

Test Scenarios

Timeout Parameter

• Test custom timeout values

ya-modbus-profile --port /tmp/ttyV1 --slave-id 1 --timeout 500

• Verify timeout parameter is accepted
• Test very short timeouts (10ms, 50ms)

Timeout Error Reporting

• Use very short timeout to force timeout errors
• Verify "Timeout" appears in Error column of output table
• Verify scan completes with FAIL status for timed-out registers
• Ensure timeout errors don't crash the profiler

Slow Device Scenarios

• Configure emulator with high processing delays
• Verify profiler waits for timeout duration
• Verify timing column reflects actual wait time

Implementation

Add tests to tests/e2e/tests/05-device-profiler.bats:

• Use --timeout parameter with small values (10-50ms)
• Verify error output contains "Timeout" or similar
• May need to adjust emulator timing configuration for realistic slow-device tests

Acceptance Criteria

• Timeout parameter test passes
• Timeout errors appear in output
• Profiler completes scan even with timeouts
• Timing column shows appropriate values
• Tests use existing fixtures/helpers

Related

• PR test(e2e): add device-profiler register scanning tests #366 (device-profiler E2E tests)
• Unit tests: packages/device-profiler/src/register-scanner.test.ts