feat: add consilium integration, autossh, checkpoint/resume, and auto-recovery

- Integrate consilium multi-model council for step generation (_vlm_call)
  with graceful fallback to single-model (gpt-4.1-mini) on failure
- Add efficiency-focused step generation with human/agent target modes
- Fix prompt framing in _refine_steps (remove sycophantic "user says wrong")
- Add grounded reasoning (describe screenshot before listing steps)
- Add checkpoint/resume: save recording state after every step to survive
  tunnel drops or crashes, with interactive resume on reconnection
- Add --auto/--auto-vm/--auto-tunnel/--auto-container flags for automatic
  infrastructure recovery (VM start, SSH tunnels, Docker container, socat)
- Prefer autossh over plain ssh for tunnel auto-reconnection
- Add bcdedit recoveryenabled=No to Dockerfile FirstLogonCommands to prevent
  Windows Automatic Repair loops after dirty shutdown
- Add retry (3x) for task config fetch to handle transient connection aborts
- Add resilience-options.md documenting infrastructure recovery strategies
- Add test_vlm_call.py with 10 tests covering image passing, checkpoint
  roundtrip, prompt construction, and fallback model validation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: abrichr