Feature: Headless Mode (CI/Cron Support)

[whoisjayd]

Problem Description

The PipelineOrchestrator forces the use of the PipelineDashboard (Rich UI), which requires a TTY. This prevents running yt-study in CI pipelines or background services.

Proposed Solution

Add a mode that bypasses the TUI for simple logging.

Implementation Details

• Add --headless / --no-ui flag
• In orchestrator, check flag before initializing Dashboard
• If headless, use standard python logging or simple print statements for progress
• Ensure exit codes are propagated correctly

Acceptance Criteria

• Tool runs successfully in non-interactive shell (CI)
• Logs are readable in text files
• Functionality remains identical to UI mode

References

• src/yt_study/pipeline/orchestrator.py