Add timeout handling to run_tracked function

[tomaszwojcikowski]

Add optional timeout parameter to run_tracked

Adds run_tracked/3 with an optional timeout parameter to allow limiting task execution time. The existing run_tracked/2 preserves backward compatibility by using infinity as the default timeout.

Changes

• Add run_tracked/3 with configurable timeout support
• Tasks exceeding the timeout are terminated and logged with task_timeout error
• run_tracked/2 maintains previous behavior (no timeout)
• Add test case run_tracked_timeout to verify timeout functionality

[codecov]

Codecov Report

❌ Patch coverage is 95.83333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 98.35%. Comparing base (a8290be) to head (caa8999).

Files with missing lines	Patch %	Lines
src/cets_long.erl	95.83%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
- Coverage   98.44%   98.35%   -0.09%     
==========================================
  Files          11       11              
  Lines         834      851      +17     
==========================================
+ Hits          821      837      +16     
- Misses         13       14       +1     

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