fix(logging): handle mid-line streaming output in test logger and add streaming tests

changelog.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 2026-01-19 - 3.1.6 - fix(logging)
+handle mid-line streaming output in test logger and add streaming tests
+
+- Introduce isOutputMidLine flag to track when streaming output does not end with a newline
+- Only prepend the visual prefix at the start of a line and append segments to the last buffered entry when mid-line
+- Write consistent output to log files for both complete lines and raw streaming segments
+- Add tests to exercise streaming behavior: test/tstest/test.gap-debug.ts and test/tstest/test.gap-debug2.ts
+
 ## 2026-01-19 - 3.1.5 - fix(tstest)
 preserve streaming console output and correctly buffer incomplete TAP lines