[split] Main changes — from #21

[RoniKishner]

Automated split from #21.

Context

This is the main / behavior half of an automated split from #21.

Changes in this PR:

• utilities/console.py: Added imports: pty, shlex, subprocess, pexpect.fdpexpect
• Modified import: TimeoutSampler now imports TimeoutExpiredError
• Added instance attribute self._proc to store subprocess handle
• Modified connect method to use _spawn_console and handle TimeoutExpiredError, pexpect.exceptions.ExceptionPexpect
• Modified connect method to call _terminate_proc on connection failure
• Modified disconnect method to check _proc.poll() instead of child.terminated
• Modified disconnect method to call _terminate_proc in finally block
• Added _spawn_console method to create pty pair and wrap subprocess in fdpexpect.fdspawn
• Added _terminate_proc method for clean subprocess shutdown
• Simplified console_eof_sampler method: removed parameters and now calls _spawn_console internally

How this split maps your changes

• Refactor branch (split-pr-21-1783450195-refactor): files classified as cleanup / mechanical work:
  • utilities/unittests/test_console.py
• Main branch (split-pr-21-1783450195-main): files classified as feature / behavior work:
  • utilities/console.py

Merge order

Merge the refactor PR first if it touches shared files or would conflict with the main PR; then merge the main PR. Resolve conflicts in the usual way if both branches touch the same lines.

Refactor PR: #39