feat(analysis): add TSX support to UnifiedParser (#4466)

* chore(deps): update dependency TreesitterExcavationSite to v0.4.1

v0.3.0 of the library changed LOC counting (trailing newlines no longer counted), causing off-by-1 diffs in golden files

* feat(analysis): add TSX language support to UnifiedParser

* fix(analysis): replace fixed sleep with polling in ProjectInputReader

The fixed 100ms sleep was insufficient on CI after the TreeSitter v0.4.1
dependency bump (1.5 MB JAR), which slightly increased JVM startup time.
The upstream svnlogparser process no longer wrote its sync flag within
100ms, so modify read an empty stdin and skipped writing the output file.

Replace with a polling loop (50ms interval, 500ms max) that exits as soon
as data is available, making the pipe chain robust to JVM startup variance.

* fix(analysis): resolve SonarCloud quality gate failures for TSX support

* fix(analysis): complete mean_complexity_per_function descriptor in tsx fixture

* fix(analysis): add missing link and analyzers to mean_complexity_per_function descriptor

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Co-authored-by: Ulrike Kiesel <ulrike.kiesel@maibornwolff.de>