fix(flow): emit partial sliding window on early close

[reugn]

No description provided.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.53%. Comparing base (3872dfc) to head (a3ced6c).

Files with missing lines	Patch %	Lines
flow/sliding_window.go	0.00%	1 Missing and 1 partial ⚠️
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #192      +/-   ##
==========================================
- Coverage   99.87%   99.53%   -0.34%     
==========================================
  Files          13       13              
  Lines         811      651     -160     
==========================================
- Hits          810      648     -162     
- Misses          1        2       +1     
- Partials        0        1       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.