chore: delete outdated run node.py script

[mojtaba-esk]

Describe your changes and provide context

Closes PLT-124

Testing performed to validate your change

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Feb 19, 2026, 9:32 AM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.38%. Comparing base (2a1ba1f) to head (9120912).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2916   +/-   ##
=======================================
  Coverage   48.38%   48.38%           
=======================================
  Files         671      671           
  Lines       50624    50624           
=======================================
  Hits        24492    24492           
  Misses      23985    23985           
  Partials     2147     2147           

Flag	Coverage Δ
sei-cosmos	48.19% <ø> (ø)
sei-db	68.42% <ø> (ø)

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