Add table self-overflow detection with element-identity wrapper dedup,
mirroring the image_aspect_mismatch axis pattern (#45).
JS layer: TABLE_SCROLL_TOL_PX=5 module constant; clippedWrapperMap
built as Map<Element,int> keyed by DOM node reference (NOT className)
so two wrappers with identical class strings remain distinguishable;
table_events collected via querySelectorAll('table').forEach with
closest()-ancestor walk resolving wrapper_clipped_index = int|null.
Py layer: aggregate result['table_events'] and append fail_reason
'table_self_overflow' only when (excess_x>TOL OR excess_y>TOL)
AND wrapper_clipped_index is None; wrapper-clipped path continues
to fail via existing clipped_inner reporting.
Tests (Selenium, chromedriver guard mirrored from image_check):
- Fixture D: standalone <table> overflow → table_self_overflow fail
- Fixture E: <table> in clipped wrapper → dedup suppresses table fail
- Fixture F (F1 acceptance): two wrappers with identical className
f13b-cell, W1 clipped by non-table child, W2 hosts self-overflow
<table> with W2 itself NOT clipped → element-identity ensures W2's
table is not suppressed by W1's class; both fails emitted.
Out of scope: image_events behavior (intact from #45), classifier
pass/fail consumer (→실행-3), debug.json surfacing (→실행-4).
Refs: #46
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>