feat: Adds support for live print context and run_pool context propagation

[EspenAlbert]

Summary

Adds scoped metadata for live-console scroll lines so tfdo multi-directory orchestration can prefix or suppress print_to_live / log_to_live per run directory without touching every call site.

What changed

• LivePrintContext + live_print_scope() on ask_shell.console: optional prefix and suppress via contextvars.
• print_to_live / log_to_live: honor active scope (prepend prefix; skip output when suppressed).
• run_pool.submit: captures submit-time context with copy_context() so worker threads see the same scope.

Reviewer notes

• Not breaking for existing callers; default context is unset (same behavior as before).
• copy_context on every submit: small per-task cost; intended for orchestration-scale parallelism, not hot loops with thousands of submits.
• Prefix is a separate Rich print segment, not merged into caller style; markup in prefix is caller responsibility.
• style on LivePrintContext deferred; add later if tfdo needs dim per-dir lines without per-call style=.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.34884% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.27%. Comparing base (e328236) to head (fc2090e).

Files with missing lines	Patch %	Lines
ask_shell/_internal/rich_live.py	87.50%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
+ Coverage   85.89%   86.27%   +0.38%     
==========================================
  Files          21       22       +1     
  Lines        2042     2084      +42     
==========================================
+ Hits         1754     1798      +44     
+ Misses        288      286       -2     

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